elfutils: produce correct libelf.pc file when building with full nls

When building with full lagnuage support, libelf.so will depend on and
link with libintl.so so we need to change the pkg-config template to
reflect this library dependency.

Also change the Makefile to only pass --disable-nls to configure when
the full nls support is actually disabled in the buildroot config.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/libs/elfutils/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=elfutils
 PKG_VERSION:=0.174
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://sourceware.org/$(PKG_NAME)/ftp/$(PKG_VERSION)
@@ -54,12 +54,13 @@ define Package/libelf1
 endef
 
 ifeq ($(CONFIG_BUILD_NLS),y)
-TARGET_LDFLAGS += "-lintl"
+TARGET_LDFLAGS += -lintl
+else
+CONFIGURE_ARGS += --disable-nls
 endif
 
 CONFIGURE_ARGS += \
 	--program-prefix=eu- \
-	--disable-nls \
 	--without-lzma
 
 TARGET_CFLAGS += -D_GNU_SOURCE -Wno-unused-result -Wno-format-nonliteral

package/libs/elfutils/patches/003-libintl-compatibility.patch

@@ -47,3 +47,26 @@
  /* gettext helper macros.  */
  #define _(Str) dgettext ("elfutils", Str)
  
+--- a/config/libelf.pc.in
++++ b/config/libelf.pc.in
+@@ -8,7 +8,7 @@ Description: elfutils libelf library to
+ Version: @VERSION@
+ URL: http://elfutils.org/
+ 
+-Libs: -L${libdir} -lelf
++Libs: -L${libdir} -lelf @intl_LDFLAGS@
+ Cflags: -I${includedir}
+ 
+ Requires.private: zlib
+--- a/configure.ac
++++ b/configure.ac
+@@ -538,6 +538,9 @@ AC_CONFIG_FILES([config/libelf.pc config
+ AC_SUBST(USE_NLS, yes)
+ AM_PO_SUBDIRS
+ 
++case "$USE_NLS" in yes) intl_LDFLAGS="-lintl" ;; esac
++AC_SUBST([intl_LDFLAGS])
++
+ dnl Appended to the config.h file.
+ dnl We hide all kinds of configuration magic in lib/eu-config.h.
+ AH_BOTTOM([#include <eu-config.h>])