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-rw-r--r--m4/cares-compilers.m4114
1 files changed, 64 insertions, 50 deletions
diff --git a/m4/cares-compilers.m4 b/m4/cares-compilers.m4
index 5d3035c..2b98a68 100644
--- a/m4/cares-compilers.m4
+++ b/m4/cares-compilers.m4
@@ -1,6 +1,6 @@
#***************************************************************************
#
-# Copyright (C) 2009-2011 by Daniel Stenberg et al
+# Copyright (C) 2009-2013 by Daniel Stenberg et al
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
@@ -15,7 +15,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
-# serial 67
+# serial 75
dnl CARES_CHECK_COMPILER
@@ -23,7 +23,6 @@ dnl -------------------------------------------------
dnl Verify if the C compiler being used is known.
AC_DEFUN([CARES_CHECK_COMPILER], [
- AC_BEFORE([$0],[CARES_CHECK_NO_UNDEFINED])dnl
#
compiler_id="unknown"
compiler_num="0"
@@ -156,6 +155,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_GNU_C], [
flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
flags_opt_yes="-O2"
flags_opt_off="-O0"
+ CURL_CHECK_DEF([_WIN32], [], [silent])
else
AC_MSG_RESULT([no])
fi
@@ -850,8 +850,6 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
CLANG)
#
if test "$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="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings"
@@ -959,6 +957,11 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
tmp_CFLAGS="$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"
@@ -972,6 +975,14 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [
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
+ #
fi
#
dnl Do not issue warnings for code in system include paths.
@@ -1180,6 +1191,7 @@ dnl shared libraries support undefined symbols, along with
dnl an equally configured libcurl.
AC_DEFUN([CARES_CHECK_CURLDEBUG], [
+ AC_REQUIRE([XC_LIBTOOL])dnl
AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl
cares_builddir=`pwd`
supports_curldebug="unknown"
@@ -1196,7 +1208,7 @@ AC_DEFUN([CARES_CHECK_CURLDEBUG], [
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
@@ -1258,46 +1270,6 @@ AC_DEFUN([CARES_CHECK_CURLDEBUG], [
])
-dnl CARES_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([CARES_CHECK_NO_UNDEFINED], [
- AC_BEFORE([$0],[CARES_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 CARES_CHECK_PROG_CC
-dnl -------------------------------------------------
-dnl Check for compiler program, preventing CFLAGS and
-dnl CPPFLAGS from being unexpectedly changed.
-
-AC_DEFUN([CARES_CHECK_PROG_CC], [
- ac_save_CFLAGS="$CFLAGS"
- ac_save_CPPFLAGS="$CPPFLAGS"
- AC_PROG_CC
- CFLAGS="$ac_save_CFLAGS"
- CPPFLAGS="$ac_save_CPPFLAGS"
-])
-
-
dnl CARES_CHECK_COMPILER_HALT_ON_ERROR
dnl -------------------------------------------------
dnl Verifies if the compiler actually halts after the
@@ -1425,7 +1397,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
case "$compiler_id" in
CLANG)
dnl All versions of clang support -fvisibility=
- tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
+ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
tmp_CFLAGS="-fvisibility=hidden"
supports_symbol_hiding="yes"
;;
@@ -1433,7 +1405,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
dnl Only gcc 3.4 or later
if test "$compiler_num" -ge "304"; then
if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
- tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
+ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
tmp_CFLAGS="-fvisibility=hidden"
supports_symbol_hiding="yes"
fi
@@ -1452,7 +1424,7 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
printf("icc fvisibility bug test");
]])
],[
- tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
+ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
tmp_CFLAGS="-fvisibility=hidden"
supports_symbol_hiding="yes"
])
@@ -1484,12 +1456,18 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
}
]],[[
char b[16];
- char *r = dummy(&b);
+ char *r = dummy(&b[0]);
if(r)
return (int)*r;
]])
],[
supports_symbol_hiding="yes"
+ if test -f conftest.err; then
+ grep 'visibility' conftest.err >/dev/null
+ if test "$?" -eq "0"; then
+ supports_symbol_hiding="no"
+ fi
+ fi
],[
supports_symbol_hiding="no"
echo " " >&6
@@ -1509,6 +1487,42 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
])
+dnl CARES_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([CARES_CHECK_COMPILER_PROTOTYPE_MISMATCH], [
+ AC_REQUIRE([CARES_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];
+ 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 CARES_VAR_MATCH (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Verifies if shell variable VARNAME contains VALUE.
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 18:42:11 +0000