===================================================================
@@ -355,6 +355,21 @@ AC_DEFUN([AC_PROG_CPP_WERROR],
m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))
ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR
+# Check whether the CC accepts the -iquote switch.
+AC_DEFUN([ACX_CHECK_CC_ACCEPTS_IQUOTE], [
+ AC_CACHE_CHECK([wether $CC accepts -iquote], acx_cv_cc_accepts_iquote, [
+ save_CFLAGS=$CFLAGS
+ CFLAGS="-iquote ."
+ AC_COMPILE_IFELSE([int main() { return 0; }],
+ [acx_cv_cc_accepts_iquote=yes], [acx_cv_cc_accepts_iquote=no])
+ CFLAGS=$save_CFLAGS])
+
+ if test x$acx_cv_cc_accepts_iquote = xyes; then
+ cc_quote_include="-iquote "
+ else
+ cc_quote_include="-I"
+ fi])
+
# Test for GNAT.
# We require the gnatbind program, and a compiler driver that
# understands Ada. We use the user's CC setting, already found,
===================================================================
@@ -5336,6 +5336,35 @@ $as_echo "$ac_cv_safe_to_define___extens
$as_echo "#define _TANDEM_SOURCE 1" >>confdefs.h
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking wether $CC accepts -iquote" >&5
+$as_echo_n "checking wether $CC accepts -iquote... " >&6; }
+if test "${acx_cv_cc_accepts_iquote+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ save_CFLAGS=$CFLAGS
+ CFLAGS="-iquote ."
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int main() { return 0; }
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ acx_cv_cc_accepts_iquote=yes
+else
+ acx_cv_cc_accepts_iquote=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS=$save_CFLAGS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_cv_cc_accepts_iquote" >&5
+$as_echo "$acx_cv_cc_accepts_iquote" >&6; }
+
+ if test x$acx_cv_cc_accepts_iquote = xyes; then
+ cc_quote_include="-iquote "
+ else
+ cc_quote_include="-I"
+ fi
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -10240,7 +10269,7 @@ $as_echo "#define HAVE_LANGINFO_CODESET
# We will need to find libiberty.h and ansidecl.h
saved_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
+CFLAGS="$CFLAGS ${cc_quote_include}${srcdir} ${cc_quote_include}${srcdir}/../include"
for ac_func in getenv atol asprintf sbrk abort atof getcwd getwd \
strsignal strstr strverscmp \
errno snprintf vsnprintf vasprintf malloc realloc calloc \
@@ -17763,7 +17792,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 17766 "configure"
+#line 17795 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -17869,7 +17898,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 17872 "configure"
+#line 17901 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
===================================================================
@@ -302,6 +302,7 @@ AC_SUBST(CFLAGS)
# -------------------------
AC_USE_SYSTEM_EXTENSIONS
+ACX_CHECK_CC_ACCEPTS_IQUOTE
AC_PROG_CPP
AC_C_INLINE
@@ -1063,7 +1064,7 @@ AM_LANGINFO_CODESET
# We will need to find libiberty.h and ansidecl.h
saved_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
+CFLAGS="$CFLAGS ${cc_quote_include}${srcdir} ${cc_quote_include}${srcdir}/../include"
gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
strsignal strstr strverscmp \
errno snprintf vsnprintf vasprintf malloc realloc calloc \
Hi Thanks to the recent changes made to stage 2 and 3 (now built with g++), i noticed a little error in the configure script that tries the system getopt declaration. Indeed, if your system defines it in a system header file named "getopt.h" (for example /usr/include/getopt.h on a Red Hat 4 configuration), the configure script will incorrectly load /path/to/gcc/src/include/getopt.h instead, and thus find no getopt declaration. This can be solved by changing the appropriate -I${srcdir}/../include by -iquote ${srcdir}/../include. I added a configure check to verify that the compiler accepts the -iquote switch (and fallback to -I otherwise). Note that this only solve the getopt case, but -I is certainly often misused (instead of -iquote that would prevent error with system header having the same name than gcc header). The attached patch has been tested for regression with a native x86_64 bootstrap. config/ 2011-08-10 Romain Geissler <romain.geissler@gmail.com> * acx.m4 (ACX_CHECK_CC_ACCEPTS_IQUOTE) : Define. gcc/ 2011-08-10 Romain Geissler <romain.geissler@gmail.com> * configure.ac (acx_cv_cc_accepts_iquote): Define through a call to ACX_CHECK_CC_ACCEPTS_IQUOTE. (CFLAGS for gcc_AC_CHECK_DECLS): Use $acx_cv_cc_accepts_iquote instead of "-I". * configure: Regenerate. Romain Geissler