GNU C Library master sources branch master updated. glibc-2.25-6-g95b2e07

[jsm28 at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=95b2e07fafddc57d818dd408e5ab1e0eb26cd9f1

commit 95b2e07fafddc57d818dd408e5ab1e0eb26cd9f1
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon Feb 6 17:48:02 2017 +0000

    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.

diff --git a/ChangeLog b/ChangeLog
index fa2fbf0..433261a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2017-02-06  Joseph Myers  <joseph@codesourcery.com>
+
+	* math/Makefile (before-compile): Remove.
+
 2017-02-06  Ivo Raisr <ivo.raisr@oracle.com>
 
 	[BZ #21075]
diff --git a/math/Makefile b/math/Makefile
index 0ee4648..dd3b05a 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

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog     |    4 ++++
 math/Makefile |    3 ---
 2 files changed, 4 insertions(+), 3 deletions(-)


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