Fix compiling for Linux

Author: tleino

Makefile.in

@@ -1,5 +1,5 @@
 SHELL = /bin/sh
-CFLAGS = -g -Wall -pedantic -std=c99 @PKGS_CFLAGS@
+CFLAGS = -g -Wall -pedantic -std=c99 @PKGS_CFLAGS@ @SYSTEM_CFLAGS@
 LDFLAGS = @PKGS_LDFLAGS@
 
 prefix = @prefix@

configure

@@ -25,6 +25,20 @@ prefix=/usr/local
 if [ "$#" -eq 1 ] ; then prefix=$1 ; fi
 echo "prefix=${prefix}"
 
+SYSTEM_CFLAGS=
+case $(uname) in
+	Linux )
+		SYSTEM_CFLAGS=-D_POSIX_C_SOURCE=200809L
+		SYSTEM_LDFLAGS=
+	;;
+	OpenBSD )
+		SYSTEM_CFLAGS=
+		SYSTEM_LDFLAGS=
+	;;
+esac
+echo "system: $(uname)"
+echo "SYSTEM_CFLAGS=" ${SYSTEM_CFLAGS}
+
 PKGS="x11 xinerama xft"
 for a in ${PKGS} ; do
 	check_pkg $a
@@ -42,6 +56,7 @@ sed \
 	-e "s|@prefix@|${prefix}|g" \
 	-e "s|@PKGS_CFLAGS@|${PKGS_CFLAGS}|g" \
 	-e "s|@PKGS_LDFLAGS@|${PKGS_LDFLAGS}|g" \
+	-e "s|@SYSTEM_CFLAGS@|${SYSTEM_CFLAGS}|g" \
 	Makefile.in >>Makefile
 SRCS=$(sed -n '/SRCS=/,/[^ ]/p' Makefile.in | sed -e 's/SRCS=//' -e 's/\\//')
 for a in ${SRCS} ; do