Fixes build against uClibc.
uClibc provides 2 versions of clock_gettime(), one with realtime
support and one without (this is so you can avoid linking in -lrt
unless actually needed). This means that the clock_gettime() don't
need -lrt. We still need it for timer_create() so we check for this
function in addition.
We also need check if -lm is needed for isnan().
Both -lm and -lrt are needed for libs_qga.
Signed-off-by: Natanael Copa <nc...@alpinelinux.org>
---
Changes v3->v4:
- Use $pthread_lib from previous pthread test
We don't need to add it to $LIBS since it should be there already
configure | 36 ++++++++++++++++++++++++++++++++++--
1 file changed, 34 insertions(+), 2 deletions(-)
diff --git a/configure b/configure
index edf9da4..31eee91 100755
--- a/configure
+++ b/configure
@@ -2624,17 +2624,49 @@ fi
##########################################
+# Do we need libm
+cat > $TMPC << EOF
+#include <math.h>
+int main(void) { return isnan(sin(0.0)); }
+EOF
+if compile_prog "" "" ; then
+ :
+elif compile_prog "" "-lm" ; then
+ LIBS="-lm $LIBS"
+ libs_qga="-lm $libs_qga"
+else
+ echo
+ echo "Error: libm check failed"
+ echo
+ exit 1
+fi
+
+##########################################
# Do we need librt
+# uClibc provides 2 versions of clock_gettime(), one with realtime
+# support and one without. This means that the clock_gettime() don't
+# need -lrt. We still need it for timer_create() so we check for this
+# function in addition.
cat > $TMPC <<EOF
#include <signal.h>
#include <time.h>
-int main(void) { return clock_gettime(CLOCK_REALTIME, NULL); }
+int main(void) {
+ timer_create(CLOCK_REALTIME, NULL, NULL);
+ return clock_gettime(CLOCK_REALTIME, NULL);
+}
EOF
if compile_prog "" "" ; then
:
-elif compile_prog "" "-lrt" ; then
+# we need pthread for static linking. use previous pthread test result
+elif compile_prog "" "-lrt $pthread_lib" ; then
LIBS="-lrt $LIBS"
+ libs_qga="-lrt $libs_qga"
+else
+ echo
+ echo "Error: librt check failed"
+ echo
+ exit 1
fi
if test "$darwin" != "yes" -a "$mingw32" != "yes" -a "$solaris" != yes -a \
--
1.7.12
