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configure: support builds using ccache
The configure script checks whether CC is executable by means of a check
'type $CC'. However, when using ccache, CC is normally set to "ccache gcc"
(using the appropriate paths). Such a compound string is not recognized by
type, however, and thus configure bails out.
This patch changes the check 'type $CC' with a compile test.
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Upstream status: another implementation was submitted, modified by
maintainer Roy, then simplified based on my suggestion. This patch is a fold
of the two upstream patches:
http://roy.marples.name/projects/dhcpcd/info/5f4bf91142fceac502c478886aeb5079a184bb43
http://roy.marples.name/projects/dhcpcd/info/26bc10be2405659bdf31d690a72d377d6b67ebd4
diff -r 66c8bdc88858 configure
--- a/configure Sat Jun 21 16:54:30 2014 +0200
+++ b/configure Sun Jun 22 15:20:25 2014 +0200
@@ -272,8 +272,9 @@
fi
echo "Using compiler .. $CC"
-if ! type "$CC" >/dev/null 2>&1; then
- echo "$CC is not an executable"
+if ! echo "int main(void) { return 0; }" | $CC -x c -o /dev/null - 2>/dev/null
+then
+ echo "$CC does not create executables"
exit 1
fi
[ "$CC" != cc ] && echo "CC= $CC" >>$CONFIG_MK
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