firebird: update to 2.5.6 and fix gcc6 build

srcpkgs/firebird/files/fix-gcc6-no_throw_bad_alloc.patch

@@ -0,0 +1,19 @@
+--- src/common/classes/alloc.h	2015-11-16 12:39:40.000000000 +0100
++++ src/common/classes/alloc.h	2016-09-14 14:28:38.810632773 +0200
+@@ -49,14 +49,8 @@
+ 					   stdlib.h (EKU) */
+ #endif
+ 
+-// MSVC does not support exception specification, so it's unknown if that will be correct or not
+-// from its POV. For now, use it and disable the C4290 warning.
+-//
+-//#if defined (_MSC_VER)
+-//#define THROW_BAD_ALLOC
+-//#else
+-#define THROW_BAD_ALLOC throw (std::bad_alloc)
+-//#endif
++// Handled by -fcheck-new compiler option
++#define THROW_BAD_ALLOC
+ 
+ #ifdef USE_VALGRIND
+ 

srcpkgs/firebird/template

@@ -1,7 +1,7 @@
 # Template file for 'firebird'
 pkgname=firebird
-version=2.5.5.26952
+version=2.5.6.27020
-revision=4
+revision=1
 _build=0
 wrksrc="${pkgname^}-${version}-${_build}"
 build_style=gnu-configure
@@ -14,9 +14,14 @@ maintainer="Jürgen Buchmüller <pullmoll@t-online.de>"
 license="custom"
 homepage="http://www.firebirdsql.org/en/start/"
 distfiles="${SOURCEFORGE_SITE}/${pkgname}/${pkgname}/${version%.*}-Release/${pkgname^}-${version}-${_build}.tar.bz2"
-checksum=b33e63ede88184d9ef2ae6760537ab75bfe641513821410b83e837946162b7d1
+checksum=8e416f2f9a8f1fce2aa872925ca2016010878265ec56fe0a32a73e0080378826
 disable_parallel_build=yes
 
+_gccver=$(gcc --version | awk '/^gcc \(GCC\)/ { print $3 }')
+if [ "${_gccver%%.*}" -gt 5 ]; then
+	CXXFLAGS="-Wno-error=narrowing -fcheck-new -fno-delete-null-pointer-checks -fno-lifetime-dse"
+fi
+
 pre_configure() {
 	# Avoid errors telling we are not 'root' and
 	# do not change ownership to root:root and
@@ -34,6 +39,11 @@ pre_configure() {
 
 	# Set -fPIC for btyacc tool to support PIE linker flags
 	sed -i extern/btyacc/Makefile -e 's;CFLAGS=;CFLAGS=-fPIC;'
+
+	if [ "${_gccver%%.*}" -gt 5 ]; then
+		# Fix gcc6 error for "void * operator new(size_t size) { return 0; }"
+		patch -p0 < ${FILESDIR}/fix-gcc6-no_throw_bad_alloc.patch
+	fi
 }
 
 do_install() {