[gnome-keyring/trust-store] Include Makefile.local into build if it exists

[Stefan Walter <stefw src gnome org>]

commit 7a7058241b2ac601c927ec86656c56944c6b8d78
Author: Stef Walter <stefw collabora co uk>
Date:   Tue Dec 7 20:02:17 2010 +0000

    Include Makefile.local into build if it exists

 .gitignore   |    1 +
 Makefile.am  |    5 +++++
 configure.in |    3 +++
 3 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index ab6ec39..50059a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@
 stamp-*
 Makefile
 Makefile.in
+Makefile.local
 core
 test-suite.[ch]
 run-tests
diff --git a/Makefile.am b/Makefile.am
index f9558ea..5356b42 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -75,3 +75,8 @@ clear-coverage:
 	$(LCOV) --directory . --zerocounters
 
 endif
+
+if WITH_GNU_MAKE
+# Include this local file if it exists
+-include Makefile.local
+endif
\ No newline at end of file
diff --git a/configure.in b/configure.in
index 9f3f293..d5b89f0 100644
--- a/configure.in
+++ b/configure.in
@@ -651,6 +651,9 @@ AC_SUBST(LIBRARY_LIBS)
 AC_SUBST(P11_TESTS_CFLAGS)
 AC_SUBST(P11_TESTS_LIBS)
 
+# Are we running with GNU Make?
+AM_CONDITIONAL([WITH_GNU_MAKE], [make --version | grep -q 'GNU Make' > /dev/null])
+
 # HACK: Because autoconf is nasty
 if test "${prefix}" = "NONE"; then
     prefix=/usr/local