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authorRob Landley <rob@landley.net>2013-03-11 22:23:46 -0500
committerRob Landley <rob@landley.net>2013-03-11 22:23:46 -0500
commit25b043bff9de65abc0926c04053f3ba5ea8f30f7 (patch)
treeac418794a3072c1d8dc99c2ab11c7be902f9ccd0 /scripts/genconfig.sh
parent364d9ab6aa7fc6fb2b28147dd73d2183b15b45ae (diff)
downloadtoybox-25b043bff9de65abc0926c04053f3ba5ea8f30f7.tar.gz
Compile time probe to fish O_NOFOLLOW out of linux headers when fcntl doesn't conform to posix-2008.0.4.4
Diffstat (limited to 'scripts/genconfig.sh')
-rwxr-xr-xscripts/genconfig.sh28
1 files changed, 28 insertions, 0 deletions
diff --git a/scripts/genconfig.sh b/scripts/genconfig.sh
index dedfde4d..b1eb2a8e 100755
--- a/scripts/genconfig.sh
+++ b/scripts/genconfig.sh
@@ -49,5 +49,33 @@ genconfig()
done
}
+headerprobes()
+{
+ ${CROSS_COMPILE}${CC} -xc -o /dev/null - 2>/dev/null << EOF
+ #include <fcntl.h>
+ #ifndef O_NOFOLLOW
+ #error posix 2008 was a while ago now
+ #endif
+EOF
+ if [ $? -ne 0 ]
+ then
+ rm -f a.out
+ ${CROSS_COMPILE}${CC} -xc - 2>/dev/null << EOF
+ #include <stdio.h>
+ #include <sys/types.h>
+ #include <asm/fcntl.h>
+
+ int main(int argc, char *argv[])
+ {
+ printf("0x%x\n", O_NOFOLLOW);
+ }
+EOF
+ X=$(./a.out) 2>/dev/null
+ rm -f a.out
+ echo "#define O_NOFOLLOW ${X:-0}"
+ fi
+}
+
probeconfig > generated/Config.probed || rm generated/Config.probed
genconfig > generated/Config.in || rm generated/Config.in
+headerprobes > generated/portability.h || rm generated/portability.h