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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).

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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.
This commit is contained in:
Michael Kuhn 2020-06-09 14:05:07 -06:00 committed by Jeff Law
parent 84fa38d20a
commit 776256757b
3 changed files with 7 additions and 2 deletions
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5
gcc/Makefile.in
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@ -1081,7 +1081,8 @@ GNATMAKE = @GNATMAKE@
# Libs needed (at present) just for jcf-dump.
LDEXP_LIB = @LDEXP_LIB@
ZSTD_LIB = @ZSTD_LIB@
ZSTD_INC = @ZSTD_CPPFLAGS@
ZSTD_LIB = @ZSTD_LDFLAGS@ @ZSTD_LIB@
# Likewise, for use in the tools that must run on this machine
# even if we are cross-building GCC.
@ -2286,7 +2287,7 @@ CFLAGS-version.o += -DBASEVER=$(BASEVER_s) -DDATESTAMP=$(DATESTAMP_s) \
version.o: $(REVISION) $(DATESTAMP) $(BASEVER) $(DEVPHASE)
# lto-compress.o needs $(ZLIBINC) added to the include flags.
CFLAGS-lto-compress.o += $(ZLIBINC)
CFLAGS-lto-compress.o += $(ZLIBINC) $(ZSTD_INC)
CFLAGS-lto-streamer-in.o += -DTARGET_MACHINE=\"$(target_noncanonical)\"

2
gcc/configure vendored
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@ -787,6 +787,8 @@ LTLIBICONV
LIBICONV
ZSTD_LIB
ZSTD_INCLUDE
ZSTD_LDFLAGS
ZSTD_CPPFLAGS
DL_LIB
LDEXP_LIB
EXTRA_GCC_LIBS

2
gcc/configure.ac
View File

@ -1340,6 +1340,8 @@ AC_SUBST(ZSTD_INCLUDE)
AC_SUBST(ZSTD_LIB)
ZSTD_CPPFLAGS=
ZSTD_LDFLAGS=
AC_SUBST(ZSTD_CPPFLAGS)
AC_SUBST(ZSTD_LDFLAGS)
AC_ARG_WITH(zstd,
[AS_HELP_STRING([--with-zstd=PATH],
[specify prefix directory for installed zstd library.