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configure: add functions for testing code fragments

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This simplifies testing arbitrary code fragments within a function
body.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Mans Rullgard 2012-07-04 23:06:25 +01:00 • committed by Luca Barbato
parent b7558ac293
commit 5adc829eb0
1 changed files with 18 additions and 21 deletions
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39
configure vendored
View file

@ -660,6 +660,20 @@ check_ld(){
check_cmd $ld $LDFLAGS $flags -o $TMPE $TMPO $libs $extralibs
}
check_code(){
log check_code "$@"
check=$1
headers=$2
code=$3
shift 3
{
for hdr in $headers; do
echo "#include <$hdr>"
done
echo "int main(void) { $code; return 0; }"
} | check_$check "$@"
}
check_cppflags(){
log check_cppflags "$@"
set -- $($filter_cppflags "$@")
@ -817,15 +831,7 @@ check_type(){
type=$2
shift 2
disable_safe "$type"
incs=""
for hdr in $headers; do
incs="$incs
#include <$hdr>"
done
check_cc "$@" <<EOF && enable_safe "$type"
$incs
$type v;
EOF
check_code cc "$headers" "$type v" "$@" && enable_safe "$type"
}
check_struct(){
@ -835,15 +841,8 @@ check_struct(){
member=$3
shift 3
disable_safe "${struct}_${member}"
incs=""
for hdr in $headers; do
incs="$incs
#include <$hdr>"
done
check_cc "$@" <<EOF && enable_safe "${struct}_${member}"
$incs
const void *p = &(($struct *)0)->$member;
EOF
check_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
enable_safe "${struct}_${member}"
}
require(){
@ -2399,9 +2398,7 @@ case "$arch" in
;;
x86)
subarch="x86_32"
check_cc <<EOF && subarch="x86_64"
int test[(int)sizeof(char*) - 7];
EOF
check_code cc "" "int test[(int)sizeof(char*) - 7]" && subarch="x86_64"
if test "$subarch" = "x86_64"; then
spic=$shared
fi