/* Compiler driver program that can handle many languages.
- Copyright (C) 1987-2015 Free Software Foundation, Inc.
+ Copyright (C) 1987-2016 Free Software Foundation, Inc.
This file is part of GCC.
#include "opts.h"
#include "params.h"
#include "filenames.h"
+#include "spellcheck.h"
+
+\f
+
+/* Manage the manipulation of env vars.
+
+ We poison "getenv" and "putenv", so that all enviroment-handling is
+ done through this class. Note that poisoning happens in the
+ preprocessor at the identifier level, and doesn't distinguish between
+ env.getenv ();
+ and
+ getenv ();
+ Hence we need to use "get" for the accessor method, not "getenv". */
+
+class env_manager
+{
+ public:
+ void init (bool can_restore, bool debug);
+ const char *get (const char *name);
+ void xput (const char *string);
+ void restore ();
+
+ private:
+ bool m_can_restore;
+ bool m_debug;
+ struct kv
+ {
+ char *m_key;
+ char *m_value;
+ };
+ vec<kv> m_keys;
+
+};
+
+/* The singleton instance of class env_manager. */
+
+static env_manager env;
+
+/* Initializer for class env_manager.
+
+ We can't do this as a constructor since we have a statically
+ allocated instance ("env" above). */
+
+void
+env_manager::init (bool can_restore, bool debug)
+{
+ m_can_restore = can_restore;
+ m_debug = debug;
+}
+
+/* Get the value of NAME within the environment. Essentially
+ a wrapper for ::getenv, but adding logging, and the possibility
+ of caching results. */
+
+const char *
+env_manager::get (const char *name)
+{
+ const char *result = ::getenv (name);
+ if (m_debug)
+ fprintf (stderr, "env_manager::getenv (%s) -> %s\n", name, result);
+ return result;
+}
+
+/* Put the given KEY=VALUE entry STRING into the environment.
+ If the env_manager was initialized with CAN_RESTORE set, then
+ also record the old value of KEY within the environment, so that it
+ can be later restored. */
+
+void
+env_manager::xput (const char *string)
+{
+ if (m_debug)
+ fprintf (stderr, "env_manager::xput (%s)\n", string);
+ if (verbose_flag)
+ fnotice (stderr, "%s\n", string);
+
+ if (m_can_restore)
+ {
+ char *equals = strchr (const_cast <char *> (string), '=');
+ gcc_assert (equals);
+
+ struct kv kv;
+ kv.m_key = xstrndup (string, equals - string);
+ const char *cur_value = ::getenv (kv.m_key);
+ if (m_debug)
+ fprintf (stderr, "saving old value: %s\n",cur_value);
+ kv.m_value = cur_value ? xstrdup (cur_value) : NULL;
+ m_keys.safe_push (kv);
+ }
+
+ ::putenv (CONST_CAST (char *, string));
+}
+
+/* Undo any xputenv changes made since last restore.
+ Can only be called if the env_manager was initialized with
+ CAN_RESTORE enabled. */
+
+void
+env_manager::restore ()
+{
+ unsigned int i;
+ struct kv *item;
+
+ gcc_assert (m_can_restore);
+
+ FOR_EACH_VEC_ELT_REVERSE (m_keys, i, item)
+ {
+ if (m_debug)
+ printf ("restoring saved key: %s value: %s\n", item->m_key, item->m_value);
+ if (item->m_value)
+ ::setenv (item->m_key, item->m_value, 1);
+ else
+ ::unsetenv (item->m_key);
+ free (item->m_key);
+ free (item->m_value);
+ }
+
+ m_keys.truncate (0);
+}
+
+/* Forbid other uses of getenv and putenv. */
+#if (GCC_VERSION >= 3000)
+#pragma GCC poison getenv putenv
+#endif
+
+\f
/* By default there is no special suffix for target executables. */
/* FIXME: when autoconf is fixed, remove the host check - dj */
and library files can be found in an alternate location. */
#ifdef TARGET_SYSTEM_ROOT
-static const char *target_system_root = TARGET_SYSTEM_ROOT;
+#define DEFAULT_TARGET_SYSTEM_ROOT (TARGET_SYSTEM_ROOT)
#else
-static const char *target_system_root = 0;
+#define DEFAULT_TARGET_SYSTEM_ROOT (0)
#endif
+static const char *target_system_root = DEFAULT_TARGET_SYSTEM_ROOT;
/* Nonzero means pass the updated target_system_root to the compiler. */
static const char *spec_machine = DEFAULT_TARGET_MACHINE;
static const char *spec_host_machine = DEFAULT_REAL_TARGET_MACHINE;
-/* List of offload targets. */
+/* List of offload targets. Separated by colon. Empty string for
+ -foffload=disable. */
static char *offload_targets = NULL;
static void validate_all_switches (void);
static inline void validate_switches_from_spec (const char *, bool);
static void give_switch (int, int);
-static int used_arg (const char *, int);
static int default_arg (const char *, int);
static void set_multilib_dir (void);
static void print_multilib_info (void);
static const char *compare_debug_auxbase_opt_spec_function (int, const char **);
static const char *pass_through_libs_spec_func (int, const char **);
static const char *replace_extension_spec_func (int, const char **);
+static const char *greater_than_spec_func (int, const char **);
static char *convert_white_space (char *);
\f
/* The Specs Language
it is subsequently output with %*. SUFFIX is terminated by the next
space or %.
%d marks the argument containing or following the %d as a
- temporary file name, so that that file will be deleted if GCC exits
+ temporary file name, so that file will be deleted if GCC exits
successfully. Unlike %g, this contributes no text to the argument.
%w marks the argument containing or following the %w as the
"output file" of this compilation. This puts the argument
libgcc. This is not yet a real spec, though it could become one;
it is currently just stuffed into LINK_SPEC. FIXME: This wrapping
only works with GNU ld and gold. */
+#ifdef HAVE_GOLD_NON_DEFAULT_SPLIT_STACK
+#define STACK_SPLIT_SPEC " %{fsplit-stack: -fuse-ld=gold --wrap=pthread_create}"
+#else
#define STACK_SPLIT_SPEC " %{fsplit-stack: --wrap=pthread_create}"
+#endif
#ifndef LIBASAN_SPEC
#define STATIC_LIBASAN_LIBS \
#ifndef LINK_PIE_SPEC
#ifdef HAVE_LD_PIE
+#ifndef LD_PIE_SPEC
#define LD_PIE_SPEC "-pie"
+#endif
#else
#define LD_PIE_SPEC ""
#endif
%{%:sanitize(leak):" LIBLSAN_SPEC "}}}"
#endif
+#ifndef POST_LINK_SPEC
+#define POST_LINK_SPEC ""
+#endif
+
/* This is the spec to use, once the code for creating the vtable
verification runtime library, libvtv.so, has been created. Currently
the vtable verification runtime functions are in libstdc++, so we use
the spec just below this one. */
#ifndef VTABLE_VERIFICATION_SPEC
+#if ENABLE_VTABLE_VERIFY
#define VTABLE_VERIFICATION_SPEC "\
%{!nostdlib:%{fvtable-verify=std: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}\
%{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}"
+#else
+#define VTABLE_VERIFICATION_SPEC "\
+%{fvtable-verify=none:} \
+%{fvtable-verify=std: \
+ %e-fvtable-verify=std is not supported in this configuration} \
+%{fvtable-verify=preinit: \
+ %e-fvtable-verify=preinit is not supported in this configuration}"
+#endif
#endif
#ifndef CHKP_SPEC
%{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
"%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
"%X %{o*} %{e*} %{N} %{n} %{r}\
- %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
- %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
- " CHKP_SPEC " \
- %{fopenacc|fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
+ %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} \
+ %{static:} %{L*} %(mfwrap) %(link_libgcc) " \
+ VTABLE_VERIFICATION_SPEC " " SANITIZER_EARLY_SPEC " %o " CHKP_SPEC " \
+ %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
+ %:include(libgomp.spec)%(link_gomp)}\
%{fcilkplus:%:include(libcilkrts.spec)%(link_cilkrts)}\
%{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
%(mflib) " STACK_SPLIT_SPEC "\
%{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
%{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
- %{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}"
+ %{!nostdlib:%{!nostartfiles:%E}} %{T*} \n%(post_link) }}}}}}"
#endif
#ifndef LINK_LIBGCC_SPEC
static const char *linker_plugin_file_spec = "";
static const char *lto_wrapper_spec = "";
static const char *lto_gcc_spec = "";
+static const char *post_link_spec = POST_LINK_SPEC;
static const char *link_command_spec = LINK_COMMAND_SPEC;
static const char *link_libgcc_spec = LINK_LIBGCC_SPEC;
static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC;
/* Linking to libgomp implies pthreads. This is particularly important
for targets that use different start files and suchlike. */
#ifndef GOMP_SELF_SPECS
-#define GOMP_SELF_SPECS "%{fopenacc|fopenmp|ftree-parallelize-loops=*: " \
+#define GOMP_SELF_SPECS \
+ "%{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): " \
"-pthread}"
#endif
int name_len; /* length of the name */
bool user_p; /* whether string come from file spec. */
bool alloc_p; /* whether string was allocated */
+ const char *default_ptr; /* The default value of *ptr_spec. */
};
#define INIT_STATIC_SPEC(NAME,PTR) \
- { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, false, false }
+ { NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, false, false, \
+ *PTR }
/* List of statically defined specs. */
static struct spec_list static_specs[] =
INIT_STATIC_SPEC ("linker_plugin_file", &linker_plugin_file_spec),
INIT_STATIC_SPEC ("lto_wrapper", <o_wrapper_spec),
INIT_STATIC_SPEC ("lto_gcc", <o_gcc_spec),
+ INIT_STATIC_SPEC ("post_link", &post_link_spec),
INIT_STATIC_SPEC ("link_libgcc", &link_libgcc_spec),
INIT_STATIC_SPEC ("md_exec_prefix", &md_exec_prefix),
INIT_STATIC_SPEC ("md_startfile_prefix", &md_startfile_prefix),
{ "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function },
{ "pass-through-libs", pass_through_libs_spec_func },
{ "replace-extension", replace_extension_spec_func },
+ { "gt", greater_than_spec_func },
#ifdef EXTRA_SPEC_FUNCTIONS
EXTRA_SPEC_FUNCTIONS
#endif
sl->next = next;
sl->name_len = strlen (sl->name);
sl->ptr_spec = &sl->ptr;
+ gcc_assert (sl->ptr_spec != NULL);
+ sl->default_ptr = sl->ptr;
next = sl;
}
#endif
sl->alloc_p = 0;
*(sl->ptr_spec) = "";
sl->next = specs;
+ sl->default_ptr = NULL;
specs = sl;
}
if (! strcmp (suffix, "*link_command"))
link_command_spec = spec;
else
- set_spec (suffix + 1, spec, user_p);
+ {
+ set_spec (suffix + 1, spec, user_p);
+ free (spec);
+ }
}
else
{
if (link_command_spec == 0)
fatal_error (input_location, "spec file has no spec for linking");
+
+ XDELETEVEC (buffer);
}
\f
/* Record the names of temporary files we tell compilers to write,
struct temp_file *temp;
for (temp = always_delete_queue; temp; temp = temp->next)
if (! filename_cmp (name, temp->name))
- goto already1;
+ {
+ free (name);
+ goto already1;
+ }
temp = XNEW (struct temp_file);
temp->next = always_delete_queue;
static void
xputenv (const char *string)
{
- if (verbose_flag)
- fnotice (stderr, "%s\n", string);
- putenv (CONST_CAST (char *, string));
+ env.xput (string);
}
/* Build a list of search directories from PATHS.
SWITCH_LIVE to indicate this switch is true in a conditional spec.
SWITCH_FALSE to indicate this switch is overridden by a later switch.
SWITCH_IGNORE to indicate this switch should be ignored (used in %<S).
- SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored
+ SWITCH_IGNORE_PERMANENTLY to indicate this switch should be ignored.
+ SWITCH_KEEP_FOR_GCC to indicate that this switch, otherwise ignored,
+ should be included in COLLECT_GCC_OPTIONS.
in all do_spec calls afterwards. Used for %<S from self specs.
- The `validated' field is nonzero if any spec has looked at this switch;
- if it remains zero at the end of the run, it must be meaningless. */
+ The `known' field describes whether this is an internal switch.
+ The `validated' field describes whether any spec has looked at this switch;
+ if it remains false at the end of the run, the switch must be meaningless.
+ The `ordering' field is used to temporarily mark switches that have to be
+ kept in a specific order. */
#define SWITCH_LIVE (1 << 0)
#define SWITCH_FALSE (1 << 1)
static int n_infiles_alloc;
+/* True if undefined environment variables encountered during spec processing
+ are ok to ignore, typically when we're running for --help or --version. */
+
+static bool spec_undefvar_allowed;
+
/* True if multiple input files are being compiled to a single
assembly file. */
printf (_("Usage: %s [options] file...\n"), progname);
fputs (_("Options:\n"), stdout);
- fputs (_(" -pass-exit-codes Exit with highest error code from a phase\n"), stdout);
- fputs (_(" --help Display this information\n"), stdout);
- fputs (_(" --target-help Display target specific command line options\n"), stdout);
- fputs (_(" --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]\n"), stdout);
- fputs (_(" Display specific types of command line options\n"), stdout);
+ fputs (_(" -pass-exit-codes Exit with highest error code from a phase.\n"), stdout);
+ fputs (_(" --help Display this information.\n"), stdout);
+ fputs (_(" --target-help Display target specific command line options.\n"), stdout);
+ fputs (_(" --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...].\n"), stdout);
+ fputs (_(" Display specific types of command line options.\n"), stdout);
if (! verbose_flag)
- fputs (_(" (Use '-v --help' to display command line options of sub-processes)\n"), stdout);
- fputs (_(" --version Display compiler version information\n"), stdout);
- fputs (_(" -dumpspecs Display all of the built in spec strings\n"), stdout);
- fputs (_(" -dumpversion Display the version of the compiler\n"), stdout);
- fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout);
- fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout);
- fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout);
- fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout);
- fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout);
+ fputs (_(" (Use '-v --help' to display command line options of sub-processes).\n"), stdout);
+ fputs (_(" --version Display compiler version information.\n"), stdout);
+ fputs (_(" -dumpspecs Display all of the built in spec strings.\n"), stdout);
+ fputs (_(" -dumpversion Display the version of the compiler.\n"), stdout);
+ fputs (_(" -dumpmachine Display the compiler's target processor.\n"), stdout);
+ fputs (_(" -print-search-dirs Display the directories in the compiler's search path.\n"), stdout);
+ fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library.\n"), stdout);
+ fputs (_(" -print-file-name=<lib> Display the full path to library <lib>.\n"), stdout);
+ fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>.\n"), stdout);
fputs (_("\
-print-multiarch Display the target's normalized GNU triplet, used as\n\
- a component in the library path\n"), stdout);
- fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout);
+ a component in the library path.\n"), stdout);
+ fputs (_(" -print-multi-directory Display the root directory for versions of libgcc.\n"), stdout);
fputs (_("\
-print-multi-lib Display the mapping between command line options and\n\
- multiple library search directories\n"), stdout);
- fputs (_(" -print-multi-os-directory Display the relative path to OS libraries\n"), stdout);
- fputs (_(" -print-sysroot Display the target libraries directory\n"), stdout);
- fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout);
- fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler\n"), stdout);
- fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor\n"), stdout);
- fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker\n"), stdout);
- fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler\n"), stdout);
- fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor\n"), stdout);
- fputs (_(" -Xlinker <arg> Pass <arg> on to the linker\n"), stdout);
- fputs (_(" -save-temps Do not delete intermediate files\n"), stdout);
- fputs (_(" -save-temps=<arg> Do not delete intermediate files\n"), stdout);
+ multiple library search directories.\n"), stdout);
+ fputs (_(" -print-multi-os-directory Display the relative path to OS libraries.\n"), stdout);
+ fputs (_(" -print-sysroot Display the target libraries directory.\n"), stdout);
+ fputs (_(" -print-sysroot-headers-suffix Display the sysroot suffix used to find headers.\n"), stdout);
+ fputs (_(" -Wa,<options> Pass comma-separated <options> on to the assembler.\n"), stdout);
+ fputs (_(" -Wp,<options> Pass comma-separated <options> on to the preprocessor.\n"), stdout);
+ fputs (_(" -Wl,<options> Pass comma-separated <options> on to the linker.\n"), stdout);
+ fputs (_(" -Xassembler <arg> Pass <arg> on to the assembler.\n"), stdout);
+ fputs (_(" -Xpreprocessor <arg> Pass <arg> on to the preprocessor.\n"), stdout);
+ fputs (_(" -Xlinker <arg> Pass <arg> on to the linker.\n"), stdout);
+ fputs (_(" -save-temps Do not delete intermediate files.\n"), stdout);
+ fputs (_(" -save-temps=<arg> Do not delete intermediate files.\n"), stdout);
fputs (_("\
-no-canonical-prefixes Do not canonicalize paths when building relative\n\
- prefixes to other gcc components\n"), stdout);
- fputs (_(" -pipe Use pipes rather than intermediate files\n"), stdout);
- fputs (_(" -time Time the execution of each subprocess\n"), stdout);
- fputs (_(" -specs=<file> Override built-in specs with the contents of <file>\n"), stdout);
- fputs (_(" -std=<standard> Assume that the input sources are for <standard>\n"), stdout);
+ prefixes to other gcc components.\n"), stdout);
+ fputs (_(" -pipe Use pipes rather than intermediate files.\n"), stdout);
+ fputs (_(" -time Time the execution of each subprocess.\n"), stdout);
+ fputs (_(" -specs=<file> Override built-in specs with the contents of <file>.\n"), stdout);
+ fputs (_(" -std=<standard> Assume that the input sources are for <standard>.\n"), stdout);
fputs (_("\
--sysroot=<directory> Use <directory> as the root directory for headers\n\
- and libraries\n"), stdout);
- fputs (_(" -B <directory> Add <directory> to the compiler's search paths\n"), stdout);
- fputs (_(" -v Display the programs invoked by the compiler\n"), stdout);
- fputs (_(" -### Like -v but options quoted and commands not executed\n"), stdout);
- fputs (_(" -E Preprocess only; do not compile, assemble or link\n"), stdout);
- fputs (_(" -S Compile only; do not assemble or link\n"), stdout);
- fputs (_(" -c Compile and assemble, but do not link\n"), stdout);
- fputs (_(" -o <file> Place the output into <file>\n"), stdout);
- fputs (_(" -pie Create a position independent executable\n"), stdout);
- fputs (_(" -shared Create a shared library\n"), stdout);
+ and libraries.\n"), stdout);
+ fputs (_(" -B <directory> Add <directory> to the compiler's search paths.\n"), stdout);
+ fputs (_(" -v Display the programs invoked by the compiler.\n"), stdout);
+ fputs (_(" -### Like -v but options quoted and commands not executed.\n"), stdout);
+ fputs (_(" -E Preprocess only; do not compile, assemble or link.\n"), stdout);
+ fputs (_(" -S Compile only; do not assemble or link.\n"), stdout);
+ fputs (_(" -c Compile and assemble, but do not link.\n"), stdout);
+ fputs (_(" -o <file> Place the output into <file>.\n"), stdout);
+ fputs (_(" -pie Create a position independent executable.\n"), stdout);
+ fputs (_(" -shared Create a shared library.\n"), stdout);
fputs (_("\
- -x <language> Specify the language of the following input files\n\
+ -x <language> Specify the language of the following input files.\n\
Permissible languages include: c c++ assembler none\n\
'none' means revert to the default behavior of\n\
- guessing the language based on the file's extension\n\
+ guessing the language based on the file's extension.\n\
"), stdout);
printf (_("\
n_switches++;
}
+/* Set the SOURCE_DATE_EPOCH environment variable to the current time if it is
+ not set already. */
+
+static void
+set_source_date_epoch_envvar ()
+{
+ /* Array size is 21 = ceil(log_10(2^64)) + 1 to hold string representations
+ of 64 bit integers. */
+ char source_date_epoch[21];
+ time_t tt;
+
+ errno = 0;
+ tt = time (NULL);
+ if (tt < (time_t) 0 || errno != 0)
+ tt = (time_t) 0;
+
+ snprintf (source_date_epoch, 21, "%llu", (unsigned long long) tt);
+ /* Using setenv instead of xputenv because we want the variable to remain
+ after finalizing so that it's still set in the second run when using
+ -fcompare-debug. */
+ setenv ("SOURCE_DATE_EPOCH", source_date_epoch, 0);
+}
+
/* Handle an option DECODED that is unknown to the option-processing
machinery. */
}
if (decoded->opt_index == OPT_SPECIAL_unknown)
{
- /* Give it a chance to define it a a spec file. */
+ /* Give it a chance to define it a spec file. */
save_switch (decoded->canonical_option[0],
decoded->canonical_option_num_elements - 1,
&decoded->canonical_option[1], false, false);
size_t offload_targets_len = strlen (offload_targets);
offload_targets
= XRESIZEVEC (char, offload_targets,
- offload_targets_len + next - cur + 2);
- if (offload_targets_len)
- offload_targets[offload_targets_len++] = ':';
- memcpy (offload_targets + offload_targets_len, target, next - cur);
+ offload_targets_len + 1 + next - cur + 1);
+ offload_targets[offload_targets_len++] = ':';
+ memcpy (offload_targets + offload_targets_len, target, next - cur + 1);
}
}
else
compare_debug_opt = arg;
save_switch (compare_debug_replacement_opt, 0, NULL, validated, true);
+ set_source_date_epoch_envvar ();
return true;
case OPT_fdiagnostics_color_:
struct cl_option_handlers handlers;
unsigned int j;
- gcc_exec_prefix = getenv ("GCC_EXEC_PREFIX");
+ gcc_exec_prefix = env.get ("GCC_EXEC_PREFIX");
n_switches = 0;
n_infiles = 0;
/* COMPILER_PATH and LIBRARY_PATH have values
that are lists of directory names with colons. */
- temp = getenv ("COMPILER_PATH");
+ temp = env.get ("COMPILER_PATH");
if (temp)
{
const char *startp, *endp;
}
}
- temp = getenv (LIBRARY_PATH_ENV);
+ temp = env.get (LIBRARY_PATH_ENV);
if (temp && *cross_compile == '0')
{
const char *startp, *endp;
}
/* Use LPATH like LIBRARY_PATH (for the CMU build program). */
- temp = getenv ("LPATH");
+ temp = env.get ("LPATH");
if (temp && *cross_compile == '0')
{
const char *startp, *endp;
CL_DRIVER, &handlers, global_dc);
}
+ /* If the user didn't specify any, default to all configured offload
+ targets. */
+ if (ENABLE_OFFLOADING && offload_targets == NULL)
+ handle_foffload_option (OFFLOAD_TARGETS);
+
if (output_file
&& strcmp (output_file, "-") != 0
&& strcmp (output_file, HOST_BIT_BUCKET) != 0)
if (!compare_debug)
{
- const char *gcd = getenv ("GCC_COMPARE_DEBUG");
+ const char *gcd = env.get ("GCC_COMPARE_DEBUG");
if (gcd && gcd[0] == '-')
{
}
gcc_assert (!IS_ABSOLUTE_PATH (tooldir_base_prefix));
- tooldir_prefix2 = concat (tooldir_base_prefix, spec_host_machine,
+ tooldir_prefix2 = concat (tooldir_base_prefix, spec_machine,
dir_separator_str, NULL);
/* Look for tools relative to the location from which the driver is
add_infile ("help-dummy", "c");
}
+ /* Decide if undefined variable references are allowed in specs. */
+
+ /* --version and --help alone or together are safe. Note that -v would
+ make them unsafe, as they'd then be run for subprocesses as well, the
+ location of which might depend on variables possibly coming from
+ self-specs.
+
+ Count the number of options we have for which undefined variables
+ are harmless for sure, and check that nothing else is set. */
+
+ unsigned n_varsafe_options = 0;
+
+ if (print_version)
+ n_varsafe_options++;
+
+ if (print_help_list)
+ n_varsafe_options++;
+
+ spec_undefvar_allowed = (n_varsafe_options == decoded_options_count - 1);
+
alloc_switch ();
switches[n_switches].part1 = 0;
alloc_infile ();
if (!have_subst)
{
if (do_spec_1 (string, 0, NULL) < 0)
- return 0;
+ {
+ free (string);
+ return 0;
+ }
}
else
{
{
if (do_spec_1 (string, 0,
&switches[i].part1[hard_match_len]) < 0)
- return 0;
+ {
+ free (string);
+ return 0;
+ }
/* Pass any arguments this switch has. */
give_switch (i, 1);
suffix_subst = NULL;
}
}
+ free (string);
}
return p;
return ret;
}
+driver::driver (bool can_finalize, bool debug) :
+ explicit_link_files (NULL),
+ decoded_options (NULL),
+ m_option_suggestions (NULL)
+{
+ env.init (can_finalize, debug);
+}
+
+driver::~driver ()
+{
+ XDELETEVEC (explicit_link_files);
+ XDELETEVEC (decoded_options);
+ if (m_option_suggestions)
+ {
+ int i;
+ char *str;
+ FOR_EACH_VEC_ELT (*m_option_suggestions, i, str)
+ free (str);
+ delete m_option_suggestions;
+ }
+}
+
/* driver::main is implemented as a series of driver:: method calls. */
int
global_init_params ();
finish_params ();
+ init_opts_obstack ();
init_options_struct (&global_options, &global_options_set);
decode_cmdline_options_to_array (argc, argv,
void
driver::maybe_putenv_OFFLOAD_TARGETS () const
{
- const char *targets = offload_targets;
-
- /* If no targets specified by -foffload, use all available targets. */
- if (!targets)
- targets = OFFLOAD_TARGETS;
-
- if (strlen (targets) > 0)
+ if (offload_targets && offload_targets[0] != '\0')
{
obstack_grow (&collect_obstack, "OFFLOAD_TARGET_NAMES=",
sizeof ("OFFLOAD_TARGET_NAMES=") - 1);
- obstack_grow (&collect_obstack, targets,
- strlen (targets) + 1);
+ obstack_grow (&collect_obstack, offload_targets,
+ strlen (offload_targets) + 1);
xputenv (XOBFINISH (&collect_obstack, char *));
}
free (offload_targets);
+ offload_targets = NULL;
+}
+
+/* Helper function for driver::suggest_option. Populate
+ m_option_suggestions with candidate strings for misspelled options.
+ The strings will be freed by the driver's dtor. */
+
+void
+driver::build_option_suggestions (void)
+{
+ gcc_assert (m_option_suggestions == NULL);
+ m_option_suggestions = new auto_vec <char *> ();
+
+ /* We build a vec of m_option_suggestions, using add_misspelling_candidates
+ to add copies of strings, without a leading dash. */
+
+ for (unsigned int i = 0; i < cl_options_count; i++)
+ {
+ const struct cl_option *option = &cl_options[i];
+ const char *opt_text = option->opt_text;
+ switch (i)
+ {
+ default:
+ if (option->var_type == CLVC_ENUM)
+ {
+ const struct cl_enum *e = &cl_enums[option->var_enum];
+ for (unsigned j = 0; e->values[j].arg != NULL; j++)
+ {
+ char *with_arg = concat (opt_text, e->values[j].arg, NULL);
+ add_misspelling_candidates (m_option_suggestions, with_arg);
+ free (with_arg);
+ }
+ }
+ else
+ add_misspelling_candidates (m_option_suggestions, opt_text);
+ break;
+
+ case OPT_fsanitize_:
+ case OPT_fsanitize_recover_:
+ /* -fsanitize= and -fsanitize-recover= can take
+ a comma-separated list of arguments. Given that combinations
+ are supported, we can't add all potential candidates to the
+ vec, but if we at least add them individually without commas,
+ we should do a better job e.g. correcting
+ "-sanitize=address"
+ to
+ "-fsanitize=address"
+ rather than to "-Wframe-address" (PR driver/69265). */
+ {
+ for (int j = 0; sanitizer_opts[j].name != NULL; ++j)
+ {
+ /* Get one arg at a time e.g. "-fsanitize=address". */
+ char *with_arg = concat (opt_text,
+ sanitizer_opts[j].name,
+ NULL);
+ /* Add with_arg and all of its variant spellings e.g.
+ "-fno-sanitize=address" to candidates (albeit without
+ leading dashes). */
+ add_misspelling_candidates (m_option_suggestions, with_arg);
+ free (with_arg);
+ }
+ }
+ break;
+ }
+ }
+}
+
+/* Helper function for driver::handle_unrecognized_options.
+
+ Given an unrecognized option BAD_OPT (without the leading dash),
+ locate the closest reasonable matching option (again, without the
+ leading dash), or NULL.
+
+ The returned string is owned by the driver instance. */
+
+const char *
+driver::suggest_option (const char *bad_opt)
+{
+ /* Lazily populate m_option_suggestions. */
+ if (!m_option_suggestions)
+ build_option_suggestions ();
+ gcc_assert (m_option_suggestions);
+
+ /* "m_option_suggestions" is now populated. Use it. */
+ return find_closest_string
+ (bad_opt,
+ (auto_vec <const char *> *) m_option_suggestions);
}
/* Reject switches that no pass was interested in. */
void
-driver::handle_unrecognized_options () const
+driver::handle_unrecognized_options ()
{
for (size_t i = 0; (int) i < n_switches; i++)
if (! switches[i].validated)
- error ("unrecognized command line option %<-%s%>", switches[i].part1);
+ {
+ const char *hint = suggest_option (switches[i].part1);
+ if (hint)
+ error ("unrecognized command line option %<-%s%>;"
+ " did you mean %<-%s%>?",
+ switches[i].part1, hint);
+ else
+ error ("unrecognized command line option %<-%s%>",
+ switches[i].part1);
+ }
}
/* Handle the various -print-* options, returning 0 if the driver
{
if (use_ld != NULL && ! strcmp (print_prog_name, "ld"))
{
- /* Append USE_LD to to the default linker. */
+ /* Append USE_LD to the default linker. */
#ifdef DEFAULT_LINKER
char *ld;
# ifdef HAVE_HOST_EXECUTABLE_SUFFIX
{
printf (_("%s %s%s\n"), progname, pkgversion_string,
version_string);
- printf ("Copyright %s 2015 Free Software Foundation, Inc.\n",
+ printf ("Copyright %s 2016 Free Software Foundation, Inc.\n",
_("(C)"));
fputs (_("This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"),
/* Check whether a particular argument was used. The first time we
canonicalize the switches to keep only the ones we care about. */
-static int
-used_arg (const char *p, int len)
+class used_arg_t
{
+ public:
+ int operator () (const char *p, int len);
+ void finalize ();
+
+ private:
struct mswitchstr
{
const char *str;
int rep_len;
};
- static struct mswitchstr *mswitches;
- static int n_mswitches;
+ mswitchstr *mswitches;
+ int n_mswitches;
+
+};
+
+used_arg_t used_arg;
+
+int
+used_arg_t::operator () (const char *p, int len)
+{
int i, j;
if (!mswitches)
return 0;
}
+void used_arg_t::finalize ()
+{
+ XDELETEVEC (mswitches);
+ mswitches = NULL;
+ n_mswitches = 0;
+}
+
+
static int
default_arg (const char *p, int len)
{
\f
/* getenv built-in spec function.
- Returns the value of the environment variable given by its first
- argument, concatenated with the second argument. If the
- environment variable is not defined, a fatal error is issued. */
+ Returns the value of the environment variable given by its first argument,
+ concatenated with the second argument. If the variable is not defined, a
+ fatal error is issued unless such undefs are internally allowed, in which
+ case the variable name is used as the variable value. */
static const char *
getenv_spec_function (int argc, const char **argv)
{
- char *value;
+ const char *value;
+ const char *varname;
+
char *result;
char *ptr;
size_t len;
if (argc != 2)
return NULL;
- value = getenv (argv[0]);
+ varname = argv[0];
+ value = env.get (varname);
+
+ if (!value && spec_undefvar_allowed)
+ value = varname;
+
if (!value)
fatal_error (input_location,
- "environment variable %qs not defined", argv[0]);
+ "environment variable %qs not defined", varname);
/* We have to escape every character of the environment variable so
they are not interpreted as active spec characters. A
return result;
}
+/* Returns "" if ARGV[ARGC - 2] is greater than ARGV[ARGC-1].
+ Otherwise, return NULL. */
+
+static const char *
+greater_than_spec_func (int argc, const char **argv)
+{
+ char *converted;
+
+ if (argc == 1)
+ return NULL;
+
+ gcc_assert (argc >= 2);
+
+ long arg = strtol (argv[argc - 2], &converted, 10);
+ gcc_assert (converted != argv[argc - 2]);
+
+ long lim = strtol (argv[argc - 1], &converted, 10);
+ gcc_assert (converted != argv[argc - 1]);
+
+ if (arg > lim)
+ return "";
+
+ return NULL;
+}
+
/* Insert backslash before spaces in ORIG (usually a file path), to
avoid being broken by spec parser.
return orig;
}
+static void
+path_prefix_reset (path_prefix *prefix)
+{
+ struct prefix_list *iter, *next;
+ iter = prefix->plist;
+ while (iter)
+ {
+ next = iter->next;
+ free (const_cast <char *> (iter->prefix));
+ XDELETE (iter);
+ iter = next;
+ }
+ prefix->plist = 0;
+ prefix->max_len = 0;
+}
+
+/* Restore all state within gcc.c to the initial state, so that the driver
+ code can be safely re-run in-process.
+
+ Many const char * variables are referenced by static specs (see
+ INIT_STATIC_SPEC above). These variables are restored to their default
+ values by a simple loop over the static specs.
+
+ For other variables, we directly restore them all to their initial
+ values (often implicitly 0).
+
+ Free the various obstacks in this file, along with "opts_obstack"
+ from opts.c.
+
+ This function also restores any environment variables that were changed. */
+
+void
+driver::finalize ()
+{
+ env.restore ();
+ params_c_finalize ();
+ diagnostic_finish (global_dc);
+
+ is_cpp_driver = 0;
+ at_file_supplied = 0;
+ print_help_list = 0;
+ print_version = 0;
+ verbose_only_flag = 0;
+ print_subprocess_help = 0;
+ use_ld = NULL;
+ report_times_to_file = NULL;
+ target_system_root = DEFAULT_TARGET_SYSTEM_ROOT;
+ target_system_root_changed = 0;
+ target_sysroot_suffix = 0;
+ target_sysroot_hdrs_suffix = 0;
+ save_temps_flag = SAVE_TEMPS_NONE;
+ save_temps_prefix = 0;
+ save_temps_length = 0;
+ spec_machine = DEFAULT_TARGET_MACHINE;
+ greatest_status = 1;
+
+ finalize_options_struct (&global_options);
+ finalize_options_struct (&global_options_set);
+
+ obstack_free (&obstack, NULL);
+ obstack_free (&opts_obstack, NULL); /* in opts.c */
+ obstack_free (&collect_obstack, NULL);
+
+ link_command_spec = LINK_COMMAND_SPEC;
+
+ obstack_free (&multilib_obstack, NULL);
+
+ user_specs_head = NULL;
+ user_specs_tail = NULL;
+
+ /* Within the "compilers" vec, the fields "suffix" and "spec" were
+ statically allocated for the default compilers, but dynamically
+ allocated for additional compilers. Delete them for the latter. */
+ for (int i = n_default_compilers; i < n_compilers; i++)
+ {
+ free (const_cast <char *> (compilers[i].suffix));
+ free (const_cast <char *> (compilers[i].spec));
+ }
+ XDELETEVEC (compilers);
+ compilers = NULL;
+ n_compilers = 0;
+
+ linker_options.truncate (0);
+ assembler_options.truncate (0);
+ preprocessor_options.truncate (0);
+
+ path_prefix_reset (&exec_prefixes);
+ path_prefix_reset (&startfile_prefixes);
+ path_prefix_reset (&include_prefixes);
+
+ machine_suffix = 0;
+ just_machine_suffix = 0;
+ gcc_exec_prefix = 0;
+ gcc_libexec_prefix = 0;
+ md_exec_prefix = MD_EXEC_PREFIX;
+ md_startfile_prefix = MD_STARTFILE_PREFIX;
+ md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1;
+ multilib_dir = 0;
+ multilib_os_dir = 0;
+ multiarch_dir = 0;
+
+ /* Free any specs dynamically-allocated by set_spec.
+ These will be at the head of the list, before the
+ statically-allocated ones. */
+ if (specs)
+ {
+ while (specs != static_specs)
+ {
+ spec_list *next = specs->next;
+ free (const_cast <char *> (specs->name));
+ XDELETE (specs);
+ specs = next;
+ }
+ specs = 0;
+ }
+ for (unsigned i = 0; i < ARRAY_SIZE (static_specs); i++)
+ {
+ spec_list *sl = &static_specs[i];
+ if (sl->alloc_p)
+ {
+ if (0)
+ free (const_cast <char *> (*(sl->ptr_spec)));
+ sl->alloc_p = false;
+ }
+ *(sl->ptr_spec) = sl->default_ptr;
+ }
+#ifdef EXTRA_SPECS
+ extra_specs = NULL;
+#endif
+
+ processing_spec_function = 0;
+
+ argbuf.truncate (0);
+
+ have_c = 0;
+ have_o = 0;
+
+ temp_names = NULL;
+ execution_count = 0;
+ signal_count = 0;
+
+ temp_filename = NULL;
+ temp_filename_length = 0;
+ always_delete_queue = NULL;
+ failure_delete_queue = NULL;
+
+ XDELETEVEC (switches);
+ switches = NULL;
+ n_switches = 0;
+ n_switches_alloc = 0;
+
+ compare_debug = 0;
+ compare_debug_second = 0;
+ compare_debug_opt = NULL;
+ for (int i = 0; i < 2; i++)
+ {
+ switches_debug_check[i] = NULL;
+ n_switches_debug_check[i] = 0;
+ n_switches_alloc_debug_check[i] = 0;
+ debug_check_temp_file[i] = NULL;
+ }
+
+ XDELETEVEC (infiles);
+ infiles = NULL;
+ n_infiles = 0;
+ n_infiles_alloc = 0;
+
+ combine_inputs = false;
+ added_libraries = 0;
+ XDELETEVEC (outfiles);
+ outfiles = NULL;
+ spec_lang = 0;
+ last_language_n_infiles = 0;
+ gcc_input_filename = NULL;
+ input_file_number = 0;
+ input_filename_length = 0;
+ basename_length = 0;
+ suffixed_basename_length = 0;
+ input_basename = NULL;
+ input_suffix = NULL;
+ /* We don't need to purge "input_stat", just to unset "input_stat_set". */
+ input_stat_set = 0;
+ input_file_compiler = NULL;
+ arg_going = 0;
+ delete_this_arg = 0;
+ this_is_output_file = 0;
+ this_is_library_file = 0;
+ this_is_linker_script = 0;
+ input_from_pipe = 0;
+ suffix_subst = NULL;
+
+ mdswitches = NULL;
+ n_mdswitches = 0;
+
+ debug_auxbase_opt = NULL;
+
+ used_arg.finalize ();
+}
+
/* PR jit/64810.
Targets can provide configure-time default options in
OPTION_DEFAULT_SPECS. The jit needs to access these, but
size_t i;
obstack_init (&obstack);
- gcc_obstack_init (&opts_obstack);
+ init_opts_obstack ();
n_switches = 0;
for (i = 0; i < ARRAY_SIZE (option_default_specs); i++)
projects / platform / upstream / gcc.git / blobdiff