# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
-# Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
-# are also available at http://curl.haxx.se/docs/copyright.html.
+# are also available at https://curl.haxx.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 56
+# serial 67
dnl CURL_CHECK_COMPILER
flags_opt_yes="unknown"
flags_opt_off="unknown"
#
+ flags_prefer_cppflags="no"
+ #
CURL_CHECK_COMPILER_DEC_C
CURL_CHECK_COMPILER_HPUX_C
CURL_CHECK_COMPILER_IBM_C
***
*** Whatever settings are present in CFLAGS will be used for this run.
***
-*** If you wish to help the cURL project to better support your compiler
+*** If you wish to help the curl project to better support your compiler
*** you can report this and the required info on the libcurl development
-*** mailing list: http://cool.haxx.se/mailman/listinfo/curl-library/
+*** mailing list: https://cool.haxx.se/mailman/listinfo/curl-library/
***
_EOF
fi
if test "$curl_cv_have_def___clang__" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="CLANG"
- clangver=`$CC -dumpversion`
+ fullclangver=`$CC -v 2>&1 | grep version`
+ clangver=`echo $fullclangver | grep "based on LLVM " | "$SED" 's/.*(based on LLVM \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*)/\1/'`
+ if test -z "$clangver"; then
+ if echo $fullclangver | grep "Apple LLVM version " >/dev/null; then
+ dnl Starting with XCode 7 / clang 3.7, Apple clang won't tell its upstream version
+ clangver="3.7"
+ else
+ clangver=`echo $fullclangver | "$SED" 's/.*version \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/'`
+ fi
+ fi
clangvhi=`echo $clangver | cut -d . -f1`
clangvlo=`echo $clangver | cut -d . -f2`
compiler_num=`(expr $clangvhi "*" 100 + $clangvlo) 2>/dev/null`
flags_dbg_all="$flags_dbg_all -gdwarf-2"
flags_dbg_all="$flags_dbg_all -gvms"
flags_dbg_yes="-g"
- flags_dbg_off="-g0"
+ flags_dbg_off=""
flags_opt_all="-O -O0 -O1 -O2 -Os -O3 -O4"
flags_opt_yes="-Os"
flags_opt_off="-O0"
compiler_id="DEC_C"
flags_dbg_all="-g -g0 -g1 -g2 -g3"
flags_dbg_yes="-g2"
- flags_dbg_off="-g0"
+ flags_dbg_off=""
flags_opt_all="-O -O0 -O1 -O2 -O3 -O4"
flags_opt_yes="-O1"
flags_opt_off="-O0"
flags_dbg_all="$flags_dbg_all -gdwarf-2"
flags_dbg_all="$flags_dbg_all -gvms"
flags_dbg_yes="-g"
- flags_dbg_off="-g0"
- flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
+ flags_dbg_off=""
+ flags_opt_all="-O -O0 -O1 -O2 -O3 -Os -Og -Ofast"
flags_opt_yes="-O2"
flags_opt_off="-O0"
+ CURL_CHECK_DEF([_WIN32], [], [silent])
else
AC_MSG_RESULT([no])
fi
flags_opt_all="$flags_opt_all -qoptimize=5"
flags_opt_yes="-O2"
flags_opt_off="-qnooptimize"
+ flags_prefer_cppflags="yes"
else
AC_MSG_RESULT([no])
fi
compiler_id="INTEL_UNIX_C"
flags_dbg_all="-g -g0"
flags_dbg_yes="-g"
- flags_dbg_off="-g0"
+ flags_dbg_off=""
flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
flags_opt_yes="-O2"
flags_opt_off="-O0"
compiler_id="SGI_MIPS_C"
flags_dbg_all="-g -g0 -g1 -g2 -g3"
flags_dbg_yes="-g"
- flags_dbg_off="-g0"
+ flags_dbg_off=""
flags_opt_all="-O -O0 -O1 -O2 -O3 -Ofast"
flags_opt_yes="-O2"
flags_opt_off="-O0"
compiler_id="SGI_MIPSPRO_C"
flags_dbg_all="-g -g0 -g1 -g2 -g3"
flags_dbg_yes="-g"
- flags_dbg_off="-g0"
+ flags_dbg_off=""
flags_opt_all="-O -O0 -O1 -O2 -O3 -Ofast"
flags_opt_yes="-O2"
flags_opt_off="-O0"
AC_DEFUN([CURL_CONVERT_INCLUDE_TO_ISYSTEM], [
AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl
- tmp_has_include="no"
- tmp_chg_FLAGS="$CFLAGS"
- for word1 in $tmp_chg_FLAGS; do
- case "$word1" in
- -I*)
- tmp_has_include="yes"
- ;;
- esac
- done
- if test "$tmp_has_include" = "yes"; then
- tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'`
- tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'`
- CFLAGS="$tmp_chg_FLAGS"
- squeeze CFLAGS
- fi
- tmp_has_include="no"
- tmp_chg_FLAGS="$CPPFLAGS"
- for word1 in $tmp_chg_FLAGS; do
- case "$word1" in
- -I*)
- tmp_has_include="yes"
- ;;
- esac
- done
- if test "$tmp_has_include" = "yes"; then
- tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'`
- tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'`
- CPPFLAGS="$tmp_chg_FLAGS"
- squeeze CPPFLAGS
+ AC_REQUIRE([CURL_CHECK_COMPILER])dnl
+ if test "$compiler_id" = "GNU_C" ||
+ test "$compiler_id" = "CLANG"; then
+ tmp_has_include="no"
+ tmp_chg_FLAGS="$CFLAGS"
+ for word1 in $tmp_chg_FLAGS; do
+ case "$word1" in
+ -I*)
+ tmp_has_include="yes"
+ ;;
+ esac
+ done
+ if test "$tmp_has_include" = "yes"; then
+ tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'`
+ tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'`
+ CFLAGS="$tmp_chg_FLAGS"
+ squeeze CFLAGS
+ fi
+ tmp_has_include="no"
+ tmp_chg_FLAGS="$CPPFLAGS"
+ for word1 in $tmp_chg_FLAGS; do
+ case "$word1" in
+ -I*)
+ tmp_has_include="yes"
+ ;;
+ esac
+ done
+ if test "$tmp_has_include" = "yes"; then
+ tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'`
+ tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'`
+ CPPFLAGS="$tmp_chg_FLAGS"
+ squeeze CPPFLAGS
+ fi
fi
])
#
GNU_C)
#
- dnl Placeholder
- tmp_CFLAGS="$tmp_CFLAGS"
+ dnl turn implicit-function-declaration warning into error,
+ dnl at least gcc 2.95 and later support this
+ if test "$compiler_num" -ge "295"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Werror-implicit-function-declaration"
+ fi
;;
#
HP_UX_C)
IBM_C)
#
dnl Ensure that compiler optimizations are always thread-safe.
- tmp_CFLAGS="$tmp_CFLAGS -qthreaded"
+ tmp_CPPFLAGS="$tmp_CPPFLAGS -qthreaded"
dnl Disable type based strict aliasing optimizations, using worst
dnl case aliasing assumptions when compiling. Type based aliasing
dnl would restrict the lvalues that could be safely used to access
dnl a data object.
- tmp_CFLAGS="$tmp_CFLAGS -qnoansialias"
+ tmp_CPPFLAGS="$tmp_CPPFLAGS -qnoansialias"
dnl Force compiler to stop after the compilation phase, without
dnl generating an object code file when compilation has errors.
- tmp_CFLAGS="$tmp_CFLAGS -qhalt=e"
+ tmp_CPPFLAGS="$tmp_CPPFLAGS -qhalt=e"
;;
#
INTEL_UNIX_C)
dnl #147: declaration is incompatible with 'previous one'
dnl #165: too few arguments in function call
dnl #266: function declared implicitly
- tmp_CPPFLAGS="$tmp_CPPFLAGS -we 140,147,165,266"
+ tmp_CPPFLAGS="$tmp_CPPFLAGS -we140,147,165,266"
dnl Disable some remarks
dnl #279: controlling expression is constant
dnl #981: operands are evaluated in unspecified order
dnl #1469: "cc" clobber ignored
- tmp_CPPFLAGS="$tmp_CPPFLAGS -wd 279,981,1469"
+ tmp_CPPFLAGS="$tmp_CPPFLAGS -wd279,981,1469"
;;
#
INTEL_WINDOWS_C)
tmp_options="$flags_dbg_off"
fi
#
- CPPFLAGS="$tmp_CPPFLAGS"
- CFLAGS="$tmp_CFLAGS $tmp_options"
+ if test "$flags_prefer_cppflags" = "yes"; then
+ CPPFLAGS="$tmp_CPPFLAGS $tmp_options"
+ CFLAGS="$tmp_CFLAGS"
+ else
+ CPPFLAGS="$tmp_CPPFLAGS"
+ CFLAGS="$tmp_CFLAGS $tmp_options"
+ fi
squeeze CPPFLAGS
squeeze CFLAGS
CURL_COMPILER_WORKS_IFELSE([
AC_MSG_CHECKING([if compiler accepts optimizer disabling options])
tmp_options="$flags_opt_off"
fi
- CPPFLAGS="$tmp_CPPFLAGS"
- CFLAGS="$tmp_CFLAGS $tmp_options"
+ if test "$flags_prefer_cppflags" = "yes"; then
+ CPPFLAGS="$tmp_CPPFLAGS $tmp_options"
+ CFLAGS="$tmp_CFLAGS"
+ else
+ CPPFLAGS="$tmp_CPPFLAGS"
+ CFLAGS="$tmp_CFLAGS $tmp_options"
+ fi
squeeze CPPFLAGS
squeeze CFLAGS
CURL_COMPILER_WORKS_IFELSE([
CLANG)
#
if test "$want_warnings" = "yes"; then
- dnl All versions of clang support the same warnings as at least
- dnl gcc 4.2.1 except -Wunused.
tmp_CFLAGS="$tmp_CFLAGS -pedantic"
tmp_CFLAGS="$tmp_CFLAGS -Wall -Wextra"
tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
if test "$compiler_num" -ge "101"; then
tmp_CFLAGS="$tmp_CFLAGS -Wunused"
fi
+ #
+ dnl Only clang 2.8 or later
+ if test "$compiler_num" -ge "208"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wvla"
+ fi
+ #
+ dnl Only clang 2.9 or later
+ if test "$compiler_num" -ge "209"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wshift-sign-overflow"
+ fi
+ #
+ dnl Only clang 3.2 or later
+ if test "$compiler_num" -ge "302"; then
+ case $host_os in
+ cygwin* | mingw*)
+ dnl skip missing-variable-declarations warnings for cygwin and
+ dnl mingw because the libtool wrapper executable causes them
+ ;;
+ *)
+ tmp_CFLAGS="$tmp_CFLAGS -Wmissing-variable-declarations"
+ ;;
+ esac
+ fi
+ #
+ dnl Only clang 3.6 or later
+ if test "$compiler_num" -ge "306"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wdouble-promotion"
+ fi
+ #
+ dnl Only clang 3.9 or later
+ if test "$compiler_num" -ge "309"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wcomma"
+ # avoid the varargs warning, fixed in 4.0
+ # https://bugs.llvm.org/show_bug.cgi?id=29140
+ if test "$compiler_num" -lt "400"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wno-varargs"
+ fi
+ fi
fi
;;
#
dnl Also, on gcc 4.0.X it is totally unbearable and complains all
dnl over making it unusable for generic purposes. Let's not use it.
tmp_CFLAGS="$tmp_CFLAGS"
- dnl When cross-compiling with gcc 3.0 or later,
- dnl enable strict aliasing rules and warnings.
- if test "x$cross_compiling" = "xyes"; then
- tmp_CFLAGS="$tmp_CFLAGS -fstrict-aliasing -Wstrict-aliasing=2"
- fi
fi
#
dnl Only gcc 3.3 or later
tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement"
fi
#
+ dnl Only gcc 4.0 or later
+ if test "$compiler_num" -ge "400"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3"
+ fi
+ #
dnl Only gcc 4.2 or later
if test "$compiler_num" -ge "402"; then
tmp_CFLAGS="$tmp_CFLAGS -Wcast-align"
fi
+ #
dnl Only gcc 4.3 or later
if test "$compiler_num" -ge "403"; then
tmp_CFLAGS="$tmp_CFLAGS -Wtype-limits -Wold-style-declaration"
tmp_CFLAGS="$tmp_CFLAGS -Wconversion -Wno-sign-conversion -Wvla"
fi
#
+ dnl Only gcc 4.5 or later
+ if test "$compiler_num" -ge "405"; then
+ dnl Only windows targets
+ if test "$curl_cv_have_def__WIN32" = "yes"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wno-pedantic-ms-format"
+ fi
+ fi
+ #
+ dnl Only gcc 4.6 or later
+ if test "$compiler_num" -ge "406"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wdouble-promotion"
+ fi
+ #
fi
#
dnl Do not issue warnings for code in system include paths.
dnl shared libraries support undefined symbols.
AC_DEFUN([CURL_CHECK_CURLDEBUG], [
+ AC_REQUIRE([XC_LIBTOOL])dnl
AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl
supports_curldebug="unknown"
if test "$want_curldebug" = "yes"; then
fi
if test "$supports_curldebug" != "no"; then
if test "$enable_shared" = "yes" &&
- test "$need_no_undefined" = "yes"; then
+ test "x$xc_lt_shlib_use_no_undefined" = 'xyes'; then
supports_curldebug="no"
AC_MSG_WARN([shared library does not support undefined symbols.])
fi
fi
#
if test "$want_curldebug" = "yes"; then
- CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
+ CPPFLAGS="-DCURLDEBUG $CPPFLAGS"
squeeze CPPFLAGS
fi
if test "$want_debug" = "yes"; then
- CPPFLAGS="$CPPFLAGS -DDEBUGBUILD"
+ CPPFLAGS="-DDEBUGBUILD $CPPFLAGS"
squeeze CPPFLAGS
fi
])
-dnl CURL_CHECK_NO_UNDEFINED
-dnl -------------------------------------------------
-dnl Checks if the -no-undefined flag must be used when
-dnl building shared libraries. This is required on all
-dnl systems on which shared libraries should not have
-dnl references to undefined symbols. This check should
-dnl not be done before AC-PROG-LIBTOOL.
-
-AC_DEFUN([CURL_CHECK_NO_UNDEFINED], [
- AC_BEFORE([$0],[CURL_CHECK_CURLDEBUG])dnl
- AC_MSG_CHECKING([if shared libraries need -no-undefined])
- need_no_undefined="no"
- case $host in
- *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc* | *-*-aix*)
- need_no_undefined="yes"
- ;;
- esac
- if test "x$allow_undefined" = "xno"; then
- need_no_undefined="yes"
- elif test "x$allow_undefined_flag" = "xunsupported"; then
- need_no_undefined="yes"
- fi
- AC_MSG_RESULT($need_no_undefined)
-])
-
-
-dnl CURL_CHECK_PROG_CC
-dnl -------------------------------------------------
-dnl Check for compiler program, preventing CFLAGS and
-dnl CPPFLAGS from being unexpectedly changed.
-
-AC_DEFUN([CURL_CHECK_PROG_CC], [
- ac_save_CFLAGS="$CFLAGS"
- ac_save_CPPFLAGS="$CPPFLAGS"
- AC_PROG_CC
- CFLAGS="$ac_save_CFLAGS"
- CPPFLAGS="$ac_save_CPPFLAGS"
-])
-
dnl CURL_CHECK_COMPILER_HALT_ON_ERROR
dnl -------------------------------------------------
])
+dnl CURL_CHECK_COMPILER_SYMBOL_HIDING
+dnl -------------------------------------------------
+dnl Verify if compiler supports hiding library internal symbols, setting
+dnl shell variable supports_symbol_hiding value as appropriate, as well as
+dnl variables symbol_hiding_CFLAGS and symbol_hiding_EXTERN when supported.
+
+AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [
+ AC_REQUIRE([CURL_CHECK_COMPILER])dnl
+ AC_BEFORE([$0],[CURL_CONFIGURE_SYMBOL_HIDING])dnl
+ AC_MSG_CHECKING([if compiler supports hiding library internal symbols])
+ supports_symbol_hiding="no"
+ symbol_hiding_CFLAGS=""
+ symbol_hiding_EXTERN=""
+ tmp_CFLAGS=""
+ tmp_EXTERN=""
+ case "$compiler_id" in
+ CLANG)
+ dnl All versions of clang support -fvisibility=
+ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
+ tmp_CFLAGS="-fvisibility=hidden"
+ supports_symbol_hiding="yes"
+ ;;
+ GNU_C)
+ dnl Only gcc 3.4 or later
+ if test "$compiler_num" -ge "304"; then
+ if $CC --help --verbose 2>/dev/null | grep fvisibility= >/dev/null ; then
+ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
+ tmp_CFLAGS="-fvisibility=hidden"
+ supports_symbol_hiding="yes"
+ fi
+ fi
+ ;;
+ INTEL_UNIX_C)
+ dnl Only icc 9.0 or later
+ if test "$compiler_num" -ge "900"; then
+ if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
+ tmp_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -fvisibility=hidden"
+ AC_LINK_IFELSE([
+ AC_LANG_PROGRAM([[
+# include <stdio.h>
+ ]],[[
+ printf("icc fvisibility bug test");
+ ]])
+ ],[
+ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
+ tmp_CFLAGS="-fvisibility=hidden"
+ supports_symbol_hiding="yes"
+ ])
+ CFLAGS="$tmp_save_CFLAGS"
+ fi
+ fi
+ ;;
+ SUNPRO_C)
+ if $CC 2>&1 | grep flags >/dev/null && $CC -flags | grep xldscope= >/dev/null ; then
+ tmp_EXTERN="__global"
+ tmp_CFLAGS="-xldscope=hidden"
+ supports_symbol_hiding="yes"
+ fi
+ ;;
+ esac
+ if test "$supports_symbol_hiding" = "yes"; then
+ tmp_save_CFLAGS="$CFLAGS"
+ CFLAGS="$tmp_save_CFLAGS $tmp_CFLAGS"
+ squeeze CFLAGS
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ $tmp_EXTERN char *dummy(char *buff);
+ char *dummy(char *buff)
+ {
+ if(buff)
+ return ++buff;
+ else
+ return buff;
+ }
+ ]],[[
+ char b[16];
+ char *r = dummy(&b[0]);
+ if(r)
+ return (int)*r;
+ ]])
+ ],[
+ supports_symbol_hiding="yes"
+ if test -f conftest.err; then
+ grep 'visibility' conftest.err >/dev/null
+ if test "$?" -eq "0"; then
+ supports_symbol_hiding="no"
+ fi
+ fi
+ ],[
+ supports_symbol_hiding="no"
+ echo " " >&6
+ sed 's/^/cc-src: /' conftest.$ac_ext >&6
+ sed 's/^/cc-err: /' conftest.err >&6
+ echo " " >&6
+ ])
+ CFLAGS="$tmp_save_CFLAGS"
+ fi
+ if test "$supports_symbol_hiding" = "yes"; then
+ AC_MSG_RESULT([yes])
+ symbol_hiding_CFLAGS="$tmp_CFLAGS"
+ symbol_hiding_EXTERN="$tmp_EXTERN"
+ else
+ AC_MSG_RESULT([no])
+ fi
+])
+
+
+dnl CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH
+dnl -------------------------------------------------
+dnl Verifies if the compiler actually halts after the
+dnl compilation phase without generating any object
+dnl code file, when the source code tries to redefine
+dnl a prototype which does not match previous one.
+
+AC_DEFUN([CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH], [
+ AC_REQUIRE([CURL_CHECK_COMPILER_HALT_ON_ERROR])dnl
+ AC_MSG_CHECKING([if compiler halts on function prototype mismatch])
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+# include <stdlib.h>
+ int rand(int n);
+ int rand(int n)
+ {
+ if(n)
+ return ++n;
+ else
+ return n;
+ }
+ ]],[[
+ int i[2]={0,0};
+ int j = rand(i[0]);
+ if(j)
+ return j;
+ ]])
+ ],[
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([compiler does not halt on function prototype mismatch.])
+ ],[
+ AC_MSG_RESULT([yes])
+ ])
+])
+
+
dnl CURL_VAR_MATCH (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Verifies if shell variable VARNAME contains VALUE.
projects / platform / upstream / curl.git / blobdiff