From 776256757b3d12830e5449c41f1dd6c13fdf2868 Mon Sep 17 00:00:00 2001
From: Michael Kuhn <gcc@ikkoku.de>
Date: Tue, 9 Jun 2020 14:05:07 -0600
Subject: When specifying a non-system prefix with --with-zstd, the build fails
 because the header and library cannot be found (see
 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95005).

The attached patch fixes the problem and is what we use in Spack to
make GCC build with zstd support.

gcc/
	* Makefile.in (ZSTD_INC): Define.
	(ZSTD_LIB): Include ZSTD_LDFLAGS.
	(CFLAGS-lto-compress.o): Add ZSTD_INC.
	* configure.ac (ZSTD_CPPFLAGS, ZSTD_LDFLAGS): New variables for
	AC_SUBST.
	* configure: Rebuilt.
---
 gcc/configure | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'gcc/configure')

diff --git a/gcc/configure b/gcc/configure
index 629c7c7..def9d9a 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -787,6 +787,8 @@ LTLIBICONV
 LIBICONV
 ZSTD_LIB
 ZSTD_INCLUDE
+ZSTD_LDFLAGS
+ZSTD_CPPFLAGS
 DL_LIB
 LDEXP_LIB
 EXTRA_GCC_LIBS
-- 
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