On Tue, 2010-03-02 at 07:00 +0100, Ralf Wildenhues wrote:
> When you have fixed the issue (as described in the other mail)
> and then can reproduce your bug, please also try adding
> AC_PROG_CC
Sure.
> to your configure.ac before the use of LB_LINUX_COMPILE_IFELSE
> and see whether your problem goes away that way.
Here's my reproducer:
AC_INIT([pkg], [1.0])
AC_PROG_CC
#
# LB_LINUX_CONFTEST
#
# create a conftest.c file
#
AC_DEFUN([LB_LINUX_CONFTEST],
[cat >conftest.c <<_ACEOF
$1
_ACEOF
])
#
# LB_LINUX_COMPILE_IFELSE
#
# like AC_COMPILE_IFELSE
#
AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
[m4_ifvaln([$1], [LB_LINUX_CONFTEST([$1])])dnl
rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] ${LD:+"LD=$LD"} CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="$EXTRA_LNET_INCLUDE -I$LINUX/arch/`uname -m|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -I$LINUX/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
[$4],
[_AC_MSG_LOG_CONFTEST
m4_ifvaln([$5],[$5])dnl])
rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko m4_ifval([$1], [build/conftest.c conftest.c])[]dnl
])
LB_LINUX_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <linux/thread_info.h>
#if THREAD_SIZE < 8192
#error "stack size < 8192"
#endif
]],[],[echo foo])])
Which results in:
#
# LB_LINUX_CONFTEST
#
# create a conftest.c file
#
#
# LB_LINUX_COMPILE_IFELSE
#
# like AC_COMPILE_IFELSE
#
cat >conftest.c <<_ACEOF
#include <linux/thread_info.h>
#if THREAD_SIZE < 8192
#error "stack size < 8192"
#endif
_ACEOF
rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
if { ac_try='cp conftest.c build && make -d ${LD:+"LD=$LD"} CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="$EXTRA_LNET_INCLUDE -I$LINUX/arch/`uname -m|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -I$LINUX/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM $MODULE_TARGET=$PWD/build'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; } >/dev/null && { ac_try=''
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then :
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko build/conftest.c conftest.c
Cheers,
b.
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