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| author | Joseph Myers <joseph@codesourcery.com> | 2017-02-06 17:48:02 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-02-06 17:48:02 +0000 |
| commit | 95b2e07fafddc57d818dd408e5ab1e0eb26cd9f1 (patch) | |
| tree | 5ec22e0a4105e26cd5e8e5bf71d98286210a3a28 /math/Makefile | |
| parent | 0b20e02c976ddd89a4adaa3a0c26baec3e275161 (diff) | |
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Remove before-compile setting in math/Makefile.
In <https://sourceware.org/ml/libc-alpha/2015-12/msg00543.html>,
Florian noted highly parallel builds being slowed down by
gen-libm-test.pl running during the build, when it should only run for
testing, not for building glibc itself.
This is a consequence of libm-test.c being listed in before-compile.
That listing in before-compile arose from the error reported in
<https://sourceware.org/ml/libc-hacker/1999-10/msg00054.html> when
building dependencies: at that time, dependencies were generated
separation from compilation, so if a source file included a generated
file it wasn't enough for the dependencies for the .o file to be
correct, the generated file needed to be listed in before-compile.
Since <https://sourceware.org/ml/libc-hacker/2003-05/msg00001.html>,
dependencies are generated as a side-effect of compilation. This
means that having the right dependencies for the .o files for the
tests fully suffices to ensure that libm-test.c is generated by the
time it's needed; no entry in before-compile is needed. And we indeed
have such a dependency for all the tests using libm-test.c:
$(addprefix $(objpfx), $(libm-tests.o)): $(objpfx)libm-test.stmp
Thus, the before-compile definition is unnecessary, and this patch
removes it. (This may of course move serialization from the glibc
build to glibc testing, but I intend to split up libm-test.inc so that
tests for each (floating-point type, libm function) pair are built and
run separately, which should reduce that serialization.)
Tested for x86_64.
* math/Makefile (before-compile): Remove.
Diffstat (limited to 'math/Makefile')
| -rw-r--r-- | math/Makefile | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/math/Makefile b/math/Makefile index 0ee46480e2..dd3b05ab48 100644 --- a/math/Makefile +++ b/math/Makefile @@ -210,9 +210,6 @@ extra-test-objs += $(addsuffix .o, $(libm-vec-test-wrappers)) libm-tests-generated = libm-test-ulps.h libm-have-vector-test.h libm-test.c generated += $(libm-tests-generated) libm-test.stmp -# This is needed for dependencies -before-compile += $(objpfx)libm-test.c - ulps-file = $(firstword $(wildcard $(sysdirs:%=%/libm-test-ulps))) $(addprefix $(objpfx), $(libm-tests-generated)): $(objpfx)libm-test.stmp |