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From: "gcc at ikkoku dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/95005] New: zstd.h not found if installed in non-system
 prefix
Date: Fri, 08 May 2020 10:42:34 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95005

            Bug ID: 95005
           Summary: zstd.h not found if installed in non-system prefix
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gcc at ikkoku dot de
  Target Milestone: ---

Created attachment 48482
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D48482&action=3Dedit
Add zstd include directory

While adding GCC 10.1.0 to Spack, I ran into a problem with zstd: When
specifying a non-system prefix with --with-zstd (Spack installs each packag=
e in
its own prefix), the build of lto-compress.o failed because it could not fi=
nd
the zstd.h header.

The attached patch fixes the problem. It should probably be changed to expo=
rt
the appropriate compiler flag from configure.ac to avoid the ifeq in the
Makefile. However, I wanted to avoid touching configure.ac so we do not hav=
e to
regenerate configure.=