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[Qemu-devel] [PATCH] configure: verify stdio.h
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCH] configure: verify stdio.h |
Date: |
Tue, 26 Jan 2010 16:16:32 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
Verify that stdio.h supports %ll and %z
Some migw variants don't unless requested explicitly (see
http://www.mail-archive.com/address@hidden/msg00417.html)
), detect them early.
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
configure | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index 5631bbb..7bbe4bc 100755
--- a/configure
+++ b/configure
@@ -123,6 +123,31 @@ else
exit 1
fi
+# Check that stdio.h compiler is sane: some
+# mingw variants do not support %z %l that we rely on
+cat > $TMPC <<EOF
+#include <stddef.h>
+#include <stdio.h>
+size_t z = 1;
+long long ll = 2;
+int main(void) {
+ printf("z=%zd;ll=%lld;\n", z, ll);
+ return 0;
+}
+EOF
+
+if compile_prog && ($TMPE | grep "z=1;ll=2;" > /dev/null); then
+ : C compiler works ok
+else
+ echo "ERROR: \"$cc\" does not have a working stdio.h"
+ exit 1
+fi
+
+cat > $TMPC << EOF
+#include <unistd.h>
+int main(void) { return fdatasync(0); }
+EOF
+
check_define() {
cat > $TMPC <<EOF
#if !defined($1)
--
1.6.6.144.g5c3af
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