From 7c76055890fae00d70e6004b2606267657081d0f Mon Sep 17 00:00:00 2001
From: Francesco Chemolli <kinkie@squid-cache.org>
Date: Mon, 4 Jan 2016 15:39:06 +0100
Subject: [PATCH] Fix GnuTLS detection via pkg-config

---
 acinclude/squid-util.m4 | 3 +++
 configure.ac            | 8 +++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/acinclude/squid-util.m4 b/acinclude/squid-util.m4
index d7266f4f11..77493d3ac8 100644
--- a/acinclude/squid-util.m4
+++ b/acinclude/squid-util.m4
@@ -19,6 +19,7 @@ $1_LDFLAGS="${LDFLAGS}"
 $1_LIBS="${LIBS}"
 $1_CC="${CC}"
 $1_CXX="${CXX}"
+$1_CPPFLAGS="${CPPFLAGS}"
 $1_squid_saved_vars="$2"
 for squid_util_var_tosave in $$1_squid_saved_vars
 do
@@ -38,6 +39,7 @@ unset $1_LDFLAGS
 unset $1_LIBS
 unset $1_CC
 unset $1_CXX
+unset $1_CPPFLAGS
 for squid_util_var_tosave in $$1_squid_saved_vars
 do
     unset ${squid_util_var_tosave}
@@ -56,6 +58,7 @@ LDFLAGS="${$1_LDFLAGS}"
 LIBS="${$1_LIBS}"
 CC="${$1_CC}"
 CXX="${$1_CXX}"
+CPPFLAGS="${$1_CPPFLAGS}"
 for squid_util_var_tosave in $$1_squid_saved_vars
 do
     squid_util_var_tosave2="\$$1_${squid_util_var_tosave}"
diff --git a/configure.ac b/configure.ac
index b322830b61..99dcd9f4b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1237,19 +1237,21 @@ case "$with_gnutls" in
 ])
 AH_TEMPLATE(USE_GNUTLS,[GnuTLS support is available])
 if test "x$with_gnutls" != "xno"; then
-  AC_CHECK_HEADERS(gnutls/gnutls.h gnutls/x509.h)
+  SQUID_STATE_SAVE(squid_gnutls_state)
 
   # User may have provided a custom location for GnuTLS. Otherwise...
-  SQUID_STATE_SAVE(squid_gnutls_state)
   LIBS="$LIBS $LIBGNUTLS_PATH"
 
   # auto-detect using pkg-config
-  PKG_CHECK_MODULES([LIBGNUTLS],[gnutls >= 3.1.5],,[
+  PKG_CHECK_MODULES([LIBGNUTLS],[gnutls >= 3.1.5],[
+    CPPFLAGS="$CPPFLAGS $LIBGNUTLS_CFLAGS"
+    ],[
     ## find the package without pkg-config
     ## check that the library is actually new enough.
     ## by testing for a 3.1.5+ function which we use
     AC_CHECK_LIB(gnutls,gnutls_certificate_verify_peers3,[LIBGNUTLS_LIBS="-lgnutls"])
   ])
+  AC_CHECK_HEADERS(gnutls/gnutls.h gnutls/x509.h)
 
   SQUID_STATE_ROLLBACK(squid_gnutls_state) #de-pollute LIBS
 
-- 
2.47.3