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configure: check if environ is declared

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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>
This commit is contained in:
Luiz Capitulino 2012-05-23 15:48:04 -03:00 committed by Michael Roth
parent aeb29b6459
commit 8ab1bf120d
1 changed files with 19 additions and 0 deletions
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19
configure vendored
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@ -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)