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[Qemu-trivial] [PATCH] configure: check if -lm is needed for libm
From: |
Natanael Copa |
Subject: |
[Qemu-trivial] [PATCH] configure: check if -lm is needed for libm |
Date: |
Fri, 2 Dec 2011 09:45:47 +0000 |
Some systems, like uClibc, needs -lm linker flag. Check and add if
needed.
This fixes building on Alpine Linux.
Signed-off-by: Natanael Copa <address@hidden>
---
Makefile | 4 ++--
configure | 19 +++++++++++++++++++
2 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
index 301c75e..f3a291a 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ configure: ;
$(call set-vpath, $(SRC_PATH):$(SRC_PATH)/hw)
-LIBS+=-lz $(LIBS_TOOLS)
+LIBS+=-lz $(LIBS_TOOLS) $(LIBM)
ifdef BUILD_DOCS
DOCS=qemu-doc.html qemu-tech.html qemu.1 qemu-img.1 qemu-nbd.8
QMP/qmp-commands.txt
@@ -170,7 +170,7 @@ test-coroutine: test-coroutine.o qemu-timer-common.o
async.o $(coroutine-obj-y)
$(qapi-obj-y): $(GENERATED_HEADERS)
qapi-dir := $(BUILD_DIR)/qapi-generated
test-visitor.o test-qmp-commands.o qemu-ga$(EXESUF): QEMU_CFLAGS += -I
$(qapi-dir)
-qemu-ga$(EXESUF): LIBS = $(LIBS_QGA)
+qemu-ga$(EXESUF): LIBS = $(LIBS_QGA) $(LIBM)
$(qapi-dir)/test-qapi-types.c $(qapi-dir)/test-qapi-types.h :\
$(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-types.py
diff --git a/configure b/configure
index ac4840d..faa64bd 100755
--- a/configure
+++ b/configure
@@ -1287,6 +1287,24 @@ EOF
fi
##########################################
+# libm check
+
+cat > $TMPC << EOF
+#include <math.h>
+int main(void) { return isnan(0.0); }
+EOF
+if compile_prog "" "" ; then
+ LIBM=
+elif compile_prog "" "-lm" ; then
+ LIBM="-lm"
+else
+ echo
+ echo "Error: libm check failed"
+ echo
+ exit 1
+fi
+
+##########################################
# zlib check
if test "$zlib" != "no" ; then
@@ -3264,6 +3282,7 @@ echo "LIBS+=$LIBS" >> $config_host_mak
echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
echo "EXESUF=$EXESUF" >> $config_host_mak
echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
+echo "LIBM=$LIBM" >> $config_host_mak
# generate list of library paths for linker script
--
1.7.7.4
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