elementary: automatically detect if compiler can build quicklaunch binary.

legacy/elementary/configure.ac

@@ -213,6 +213,9 @@ AC_ARG_ENABLE([quick-launch],
         [AC_HELP_STRING([--disable-quick-launch], [disable quick-launch support, @<:@default=detect@:>@])],
         [want_quicklaunch=$enableval], [])
 
+# Check if we can build binary with quicklaunch support
+ELM_QUICKLAUNCH
+
 if test "x$want_quicklaunch" != "xno"; then
    AC_CHECK_FUNCS(fork, [
         have_fork="yes"

legacy/elementary/m4/elm_quicklaunch.m4

@@ -0,0 +1,24 @@
+dnl Copyright (C) 2013 Cedric Bail <cedric dot bail at samsung dot com>
+dnl That code is public domain and can be freely used or copied
+
+dnl Macro that check if -pie -rdynamic can be given to ld
+
+dnl Usage: ELM_QUICKLAUNCH
+dnl add -pie -rdynamic to LDFLAGS and -fpie to CFLAGS
+
+AC_DEFUN([ELM_QUICKLAUNCH],
+[
+AC_MSG_CHECKING([If the compiler as what it takes to do quicklaunch (-pie -rdynamic)])
+old_LDFLAGS="$LDFLAGS"
+old_CFLAGS="$CFLAGS"
+
+LDFLAGS="$LDFLAGS -pie -rdynamic"
+CFLAGS="$CFLAGS -fpie"
+
+AC_LINK_IFELSE([int main(){}],
+        [AC_MSG_RESULT([yes])],
+        [LDFLAGS="$old_LDFLAGS"
+	CFLAGS="$old_CFLAGS"
+        AC_MSG_RESULT([no])
+        ])
+])

legacy/elementary/src/bin/Makefile.am

@@ -160,11 +160,6 @@ elementary_test_LDADD = $(top_builddir)/src/lib/libelementary.la \
 elementary_test_CFLAGS =
 elementary_test_LDFLAGS =
 
-if BUILD_QUICKLAUNCH
-elementary_test_CFLAGS += -fpie
-elementary_test_LDFLAGS += -pie -rdynamic
-endif
-
 elementary_config_SOURCES = \
 config.c