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Improved checking for compiler flags.

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git-svn-id: file:///svn/unbound/trunk@63 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2007-02-05 13:47:26 +00:00
parent d8f092c53c
commit 4ca689882d
2 changed files with 25 additions and 7 deletions
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2
Makefile.in
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@ -115,7 +115,7 @@ endif
$(BUILD)%.d: $(srcdir)/%.c
$(INFO) Depend $<
@if test ! -d $(dir $@); then $(INSTALL) -d $(patsubst %/,%,$(dir $@)); fi
$Q$(SHELL) -ec '$(CC) -MM $(CPPFLAGS) $< \
$Q$(SHELL) -ec '$(CC) -MM $(CPPFLAGS) $(CFLAGS) $< \
| sed '\''s!\(.*\)\.o[ :]*!$(dir $@)\1.o $@ : !g'\'' > $@; \
[ -s $@ ] || rm -f $@'

30
configure.ac
View file

@ -37,7 +37,7 @@ fi
dnl routine to help check for needed compiler flags.
# if the given code compiles without the flag, execute argument 4
# if the given code only compiles with the flag, execute argument 3
# otherwise fail
# otherwise fail, execute argument 5.
AC_DEFUN([CHECK_COMPILER_FLAG_NEEDED],
[
AC_REQUIRE([AC_PROG_CC])
@ -54,11 +54,12 @@ else
if test -z "`$CC $CFLAGS $1 -Werror -Wall -c conftest.c 2>&1`"; then
eval "cv_prog_cc_flag_needed_$cache=yes"
else
echo 'Test with flag fails too!'
cat conftest.c
echo "$CC $CFLAGS $1 -Werror -Wall -c conftest.c 2>&1"
echo `$CC $CFLAGS $1 -Werror -Wall -c conftest.c`
exit 1
eval "cv_prog_cc_flag_needed_$cache=fail"
#echo 'Test with flag fails too!'
#cat conftest.c
#echo "$CC $CFLAGS $1 -Werror -Wall -c conftest.c 2>&1"
#echo `$CC $CFLAGS $1 -Werror -Wall -c conftest.c`
#exit 1
fi
]
fi
@ -69,9 +70,15 @@ AC_MSG_RESULT(yes)
:
$3
else
if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
AC_MSG_RESULT(no)
:
$4
else
AC_MSG_RESULT(failed)
:
$5
fi
fi
])
@ -139,6 +146,17 @@ int test() {
return a;
}
], [CFLAGS="$CFLAGS -D__EXTENSIONS__"])
# check that functions are defined
AC_CHECK_DECLS([isascii, getopt, srandom, ctime_r, isblank, gai_strerror],, [echo "Cannot set compile environment; pass defines in CFLAGS=-D... ./configure"; exit 1], [
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <netdb.h>
#include <unistd.h>
#include <getopt.h>
#include <stdbool.h>
#include <ctype.h>
])
# for Sun studio 11.
CHECK_COMPILER_FLAG(xO4, [CFLAGS="$CFLAGS -xO4"])