[PATCH 2/4] glibc: remove obsolete parallelism flag handling

[Ross Burton <ross.burton@arm.com>]

Several problems here: the comment refers to PARALLELMFLAGS (which is a
variable in glibc's Makefile) but the actual assignment is to
EGLIBCPARALLELISM, which is an eglibc-ism and thus not respected by
glibc. Thus we were emptying PARALLEL_MAKE and so not actually doing the
build in parallel.

The Makefiles as of glibc 2.44[1] actually build in parallel well using
the standard way to pass flags, so drop all of this logic.

On my machine this has noticable improvements to walltime:

  do_compile:  86s -> 44s
  do_install:  55s -> 40s

Note that there is a PARALLELMFLAGS variable in the Makefiles, but using
it has marginal gains over not and upstream are looking at removing it
entirely.

[1] glibc 7cac99621e ("Makefile: Run the subdirectory recursion in parallel")

Signed-off-by: Ross Burton <ross.burton@arm.com>
---
 meta/recipes-core/glibc/glibc.inc | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/meta/recipes-core/glibc/glibc.inc b/meta/recipes-core/glibc/glibc.inc
index 560ebef677c..27a911dd8ff 100644
--- a/meta/recipes-core/glibc/glibc.inc
+++ b/meta/recipes-core/glibc/glibc.inc
@@ -29,13 +29,6 @@ CACHED_CONFIGUREVARS:append:mipsarch = " libc_cv_ld_gnu_indirect_function=no"
 GLIBC_EXTRA_OECONF ?= ""
 GLIBC_EXTRA_OECONF:class-nativesdk = ""
 
-# glibc uses PARALLELMFLAGS variable to pass parallel build info so transfer
-# PARALLEL_MAKE into PARALLELMFLAGS and empty out PARALLEL_MAKE
-EGLIBCPARALLELISM := "PARALLELMFLAGS="${PARALLEL_MAKE}""
-EXTRA_OEMAKE[vardepsexclude] += "EGLIBCPARALLELISM"
-EXTRA_OEMAKE += "${EGLIBCPARALLELISM}"
-PARALLEL_MAKE = ""
-
 # glibc make-syscalls.sh has a number of issues with /bin/dash and
 # it's output which make calls via the SHELL also has issues, so
 # ensure make uses /bin/bash
-- 
2.43.0