From: Luiz Capitulino <lcapitulino@redhat.com>
Date: Wed, 23 May 2012 18:48:04 +0000 (-0300)
Subject: configure: check if environ is declared
X-Git-Tag: qemu-xen-4.3.0-rc1~1053^2~1
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=8ab1bf120d7fcf84f199679ad0d25acbc354c69c;p=qemu-upstream-4.5-testing.git

configure: check if environ is declared

Some systems may declare environ automatically, others don't. Check for it.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---

diff --git a/configure b/configure
index b55a792de..1f338f8dc 100755
--- a/configure
+++ b/configure
@@ -2831,6 +2831,21 @@ if compile_prog "" "" ; then
     linux_magic_h=yes
 fi
 
+########################################
+# check if environ is declared
+
+has_environ=no
+cat > $TMPC << EOF
+#include <unistd.h>
+int main(void) {
+    environ = environ;
+    return 0;
+}
+EOF
+if compile_prog "" "" ; then
+    has_environ=yes
+fi
+
 ##########################################
 # End of CC checks
 # After here, no more $cc or $ld runs
@@ -3342,6 +3357,10 @@ if test "$linux_magic_h" = "yes" ; then
   echo "CONFIG_LINUX_MAGIC_H=y" >> $config_host_mak
 fi
 
+if test "$has_environ" = "yes" ; then
+  echo "CONFIG_HAS_ENVIRON=y" >> $config_host_mak
+fi
+
 # USB host support
 case "$usb" in
 linux)