+Tue Feb 21 00:10:50 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
+
+ * csu/Makefile (crtstuff): New variable consolidates crti, crtn;
+ add crti_s, crtn_s.
+ (install-lib, extra-objs, generated-, omit-deps): Use that.
+ (initfini): New canned sequence, broken out of crt[in].s rule.
+ (crt[in].s rule): Use it.
+ (crt[in]_s.s): New rule.
+ * csu/initfini.c (GLOBAL): New macro; define it to empty if undefined.
+ (_init, _fini): Use GLOBAL as storage class.
+ Add self reference to avoid GCC optimizing out the functions.
+
+ * Makefile (headers): Remove $(stddef.h).
+ * Makeconfig (stddef.h): Variable removed; now require gcc version
+ >= 2.2.
+ * stddef.h: File removed.
+
+Mon Feb 20 19:42:31 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
+
+ * sysdeps/unix/bsd/ultrix4/mips/start.S: Remove `__environ'
+ definition.
+ * sysdeps/unix/bsd/osf1/alpha/start.S: Likewise.
+
+ * stdlib/strtod.c: Allow the string to start with a decimal point
+ without a leading zero.
+
Mon Feb 20 04:04:57 1995 Roland McGrath <roland@duality.gnu.ai.mit.edu>
* Makefile (subdirs): Put csu first.
includedir = $(exec_prefix)/include
endif
-# Define if the library should install its own <stddef.h>.
-# Do this unless you are using version 2.2 or later of GCC.
-ifndef stddef.h
-stddef.h = stddef.h
-endif
-
# Where to install machine-independent data files.
# These are the timezone database, and eventually the locale database.
ifndef datadir
no-libc.a bin lib \
data headers others)
\f
-headers := features.h errno.h sys/errno.h errnos.h limits.h $(stddef.h)
+headers := features.h errno.h sys/errno.h errnos.h limits.h
aux = sysdep $(libc-init) version
echo-headers: subdir_echo-headers
include ../Makeconfig
ifneq ($(elf),yes)
+
# When not using ELF, there is just one startfile, called crt0.o.
start-installed-name = crt0.o
+
else
+
# In the ELF universe, crt0.o is called crt1.o, and there are
# some additional bizarre files.
start-installed-name = crt1.o
-install-lib += crti.o crtn.o
-extra-objs += crti.o crtn.o
-generated += crti.s crtn.s
-omit-deps += crti crtn
+
+# These are the special initializer/finalizer files. They are always the
+# first and last file in the link. crti.o ... crtn.o are used for normal
+# linking; they define the global "functions" _init and _fini to run the
+# .init and .fini sections. crti_s.o ... crtn_s.o are for making shared
+# library objects; they put the prologue/epilogue code into the .init and
+# .fini sections, but define no global symbols.
+crtstuff = crti crtn crti_s crtn_s
+
+install-lib += $(crtstuff:=.o)
+extra-objs += $(crtstuff:=.o)
+generated += $(crtstuff:=.s)
+omit-deps += $(crtstuff)
# Compile initfini.c to assembly code, which contains embedded shell
# commands that prodice crti.s-new and crtn.s-new when run. We need to
# disable emission of .size directives and debugging information, since
# they will get confused by the splitting of the output we do.
-$(objpfx)cr%i.s $(objpfx)cr%n.s: initfini.c
- -rm -f $(objpfx)crtcommon.tmp
- (echo 'cat > crtcommon.tmp <<\EOF_common'; \
- $(CC) $< $(CPPFLAGS) $(CFLAGS) -finhibit-size-directive -g0 -S -o -; \
- echo 'EOF_common') | (cd $(@D); $(SHELL))
- cat $(objpfx)crtcommon.tmp >> $(objpfx)crti.s-new
- cat $(objpfx)crtcommon.tmp >> $(objpfx)crtn.s-new
- rm -f $(objpfx)crtcommon.tmp
- mv -f $(objpfx)crti.s-new $(objpfx)crti.s
- mv -f $(objpfx)crtn.s-new $(objpfx)crtn.s
-endif
+$(objpfx)cr%i.s $(objpfx)cr%n.s: initfini.c; $(initfini)
+$(objpfx)cr%i_s.s $(objpfx)cr%n_s.s: initfini.c; $(initfini)
+
+define initfini
+-rm -f $(objpfx)crtcommon.tmp
+(echo 'cat > crtcommon.tmp <<\EOF_common'; \
+ $(CC) $< $(CPPFLAGS) $(CFLAGS) \
+ $(patsubst %,-DGLOBAL=static,$(filter %_s.s,$@)) \
+ -finhibit-size-directive -g0 -S -o -; \
+ echo 'EOF_common') | (cd $(@D); $(SHELL))
+cat $(objpfx)crtcommon.tmp >> $(objpfx)crti.s-new
+cat $(objpfx)crtcommon.tmp >> $(objpfx)crtn.s-new
+rm -f $(objpfx)crtcommon.tmp
+mv -f $(objpfx)crti.s-new $(subst crtn,crti,$@)
+mv -f $(objpfx)crtn.s-new $(subst crti,crtn,$@)
+endef
+endif
include ../Rules
#include <stdlib.h>
+/* We are compiled with -DGLOBAL=static to generate the versions used for
+ shared libraries' .init and .fini sections, which do not have entry
+ point symbols. */
+#ifndef GLOBAL
+#define GLOBAL
+#endif
+
/* These declarations make the functions go in the right sections when
we define them below. GCC syntax does not allow the attribute
specifications to be in the function definitions themselves. */
-void _init (void) __attribute__ ((section (".init")));
-void _fini (void) __attribute__ ((section (".fini")));
+GLOBAL void _init (void) __attribute__ ((section (".init")));
+GLOBAL void _fini (void) __attribute__ ((section (".fini")));
/* End the here document containing the initial common code.
Then move the output file crtcommon.tmp to crti.s-new and crtn.s-new. */
/* Append the .init prologue to crti.s-new. */
asm ("cat >> crti.s-new <<\\EOF.crti.init");
-void
+GLOBAL void
_init (void)
{
+ (void) &_init; /* Don't optimize out the function! */
/* End the here document containing the .init prologue code.
Then fetch the .section directive just written and append that
to crtn.s-new, followed by the function epilogue. */
\n\
cat >> crti.s-new <<\\EOF.crti.fini");
-void
+GLOBAL void
_fini (void)
{
+ (void) &_fini; /* Don't optimize out the function! */
/* End the here document containing the .fini prologue code.
Then fetch the .section directive just written and append that
to crtn.s-new, followed by the function epilogue. */
/* Return 0.0 if no legal string is found.
No character is used even if a sign was found. */
- if (!isdigit (c))
+ if (!isdigit (c) && (c != decimal || !isdigit (cp[1])))
RETURN (0.0, nptr);
/* Record the start of the digits, in case we will check their grouping. */
#include <sysdep.h>
-#ifndef HAVE_WEAK_SYMBOLS
-#define __environ environ
-#else
-weak_alias (__environ, environ)
-#endif
-
-.comm __environ, 8
.comm errno, 4
!.sdata
#include <sysdep.h>
-#ifndef HAVE_WEAK_SYMBOLS
-#define __environ environ
-#else
-weak_alias (__environ, environ)
-#endif
-
-.comm __environ, 4
.comm errno, 4
ENTRY(__start)
#define DECL_DUMMIES
#endif
-VOLATILE int errno;
-
-#ifndef HAVE_WEAK_SYMBOLS
-#undef environ
-#define __environ environ
+#ifndef errno
+volatile int errno;
#endif
extern void EXFUN(__libc_init, (int argc, char **argv, char **envp));
start1();
}
-#if !defined (NO_UNDERSCORES) && defined (HAVE_GNU_LD) && !defined (__GNUC__)
+#if !defined (NO_UNDERSCORES) && defined (HAVE_WEAK_SYMBOLS)
/* Make an alias called `start' (no leading underscore,
so it can't conflict with C symbols) for `_start'. */
-asm(".stabs \"start\",11,0,0,0");
-asm(".stabs \"__start\",1,0,0,0");
+asm (".weak start; start = _start");
#endif
#endif
projects / platform / upstream / glibc.git / commitdiff