diff options
| -rw-r--r-- | aclocal.m4 | 54 | ||||
| -rwxr-xr-x | configure | 36 | ||||
| -rw-r--r-- | configure.ac | 2 |
3 files changed, 92 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index b5f9cb0e8da..99913e7f3b8 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -12,6 +12,60 @@ # PARTICULAR PURPOSE. m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) +# +# DESCRIPTION +# +# Check whether the given FLAG works with the current language's compiler +# or gives an error. (Warnings, however, are ignored) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# If EXTRA-FLAGS is defined, it is added to the current language's default +# flags (e.g. CFLAGS) when the check is done. The check is thus made with +# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to +# force the compiler to issue an error when a bad flag is given. +# +# INPUT gives an alternative input source to AC_COMPILE_IFELSE. +# +# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this +# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> +# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> +# +# Copying and distribution of this file, with or without modification, are +# permitted in any medium without royalty provided the copyright notice +# and this notice are preserved. This file is offered as-is, without any +# warranty. + +#serial 6 + +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], + [AS_VAR_SET(CACHEVAR,[yes])], + [AS_VAR_SET(CACHEVAR,[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_VAR_IF(CACHEVAR,yes, + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS + # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- # serial 11 (pkg-config-0.29.1) diff --git a/configure b/configure index df7118f68d3..29f33b543ec 100755 --- a/configure +++ b/configure @@ -6484,8 +6484,44 @@ if test "$Py_OPT" = 'true' ; then DEF_MAKE_RULE="build_all" case $CC in *gcc*) + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -fno-semantic-interposition" >&5 +$as_echo_n "checking whether C compiler accepts -fno-semantic-interposition... " >&6; } +if ${ax_cv_check_cflags___fno_semantic_interposition+:} false; then : + $as_echo_n "(cached) " >&6 +else + + ax_check_save_flags=$CFLAGS + CFLAGS="$CFLAGS -fno-semantic-interposition" + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ax_cv_check_cflags___fno_semantic_interposition=yes +else + ax_cv_check_cflags___fno_semantic_interposition=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext + CFLAGS=$ax_check_save_flags +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___fno_semantic_interposition" >&5 +$as_echo "$ax_cv_check_cflags___fno_semantic_interposition" >&6; } +if test "x$ax_cv_check_cflags___fno_semantic_interposition" = xyes; then : + CFLAGS_NODIST="$CFLAGS_NODIST -fno-semantic-interposition" LDFLAGS_NODIST="$LDFLAGS_NODIST -fno-semantic-interposition" + +else + : +fi + ;; esac diff --git a/configure.ac b/configure.ac index c63c1e88a23..9698c3c888a 100644 --- a/configure.ac +++ b/configure.ac @@ -1320,8 +1320,10 @@ if test "$Py_OPT" = 'true' ; then DEF_MAKE_RULE="build_all" case $CC in *gcc*) + AX_CHECK_COMPILE_FLAG([-fno-semantic-interposition],[ CFLAGS_NODIST="$CFLAGS_NODIST -fno-semantic-interposition" LDFLAGS_NODIST="$LDFLAGS_NODIST -fno-semantic-interposition" + ]) ;; esac |