sci-libs/openblas: improved parallel build fix.

Bug: https://bugs.gentoo.org/910174
Signed-off-by: Michael Orlitzky <mjo@gentoo.org>

2 files changed, 69 insertions, 2 deletions

diff --git a/sci-libs/openblas/files/openblas-0.3.23-parallel-make.patch b/sci-libs/openblas/files/openblas-0.3.23-parallel-make.patch
new file mode 100644
index 000000000000..ce0487a6b2c0
--- /dev/null
+++ b/sci-libs/openblas/files/openblas-0.3.23-parallel-make.patch
@@ -0,0 +1,67 @@
+From 281e834566a06f1c756d262dc31e809faaf8933f Mon Sep 17 00:00:00 2001
+From: Guillaume Horel <guillaume.horel@gmail.com>
+Date: Thu, 30 Mar 2023 15:15:25 -0400
+Subject: [PATCH 1/2] do not pass -j flag to the MAKE variable
+
+---
+ getarch.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/getarch.c b/getarch.c
+index 937a8db68c..87384c0840 100644
+--- a/getarch.c
++++ b/getarch.c
+@@ -1930,15 +1930,15 @@ printf("ELF_VERSION=2\n");
+ 
+ #ifdef MAKE_NB_JOBS
+   #if MAKE_NB_JOBS > 0
+-    printf("MAKE += -j %d\n", MAKE_NB_JOBS);
++    printf("MAKEFLAGS += -j %d\n", MAKE_NB_JOBS);
+   #else
+     // Let make use parent -j argument or -j1 if there
+     // is no make parent
+   #endif
+ #elif NO_PARALLEL_MAKE==1
+-    printf("MAKE += -j 1\n");
++    printf("MAKEFLAGS += -j 1\n");
+ #else
+-    printf("MAKE += -j %d\n", get_num_cores());
++    printf("MAKEFLAGS += -j %d\n", get_num_cores());
+ #endif
+ 
+     break;
+
+From 397108fba299c87ce17957452d57469af914f516 Mon Sep 17 00:00:00 2001
+From: Guillaume Horel <guillaume.horel@gmail.com>
+Date: Fri, 31 Mar 2023 09:22:40 -0400
+Subject: [PATCH 2/2] serialize shared prerequisites
+
+---
+ Makefile | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 144b3400db..3c4b8948af 100644
+--- a/Makefile
++++ b/Makefile
+@@ -40,9 +40,9 @@ LAPACK_NOOPT := $(filter-out -O0 -O1 -O2 -O3 -Ofast -O -Og -Os,$(LAPACK_FFLAGS))
+ SUBDIRS_ALL = $(SUBDIRS) test ctest utest exports benchmark ../laswp ../bench cpp_thread_test
+ 
+ .PHONY : all libs netlib $(RELA) test ctest shared install
+-.NOTPARALLEL : all libs $(RELA) prof lapack-test install blas-test
++.NOTPARALLEL : shared
+ 
+-all :: libs netlib $(RELA) tests shared
++all :: tests
+ 	@echo
+ 	@echo " OpenBLAS build complete. ($(LIB_COMPONENTS))"
+ 	@echo
+@@ -150,7 +150,7 @@ ifeq ($(OSNAME), CYGWIN_NT)
+ endif
+ endif
+ 
+-tests : libs netlib $(RELA) shared
++tests : shared
+ ifeq ($(NOFORTRAN), $(filter 0,$(NOFORTRAN)))
+ 	touch $(LIBNAME)
+ ifndef NO_FBLAS
diff --git a/sci-libs/openblas/openblas-0.3.23.ebuild b/sci-libs/openblas/openblas-0.3.23.ebuild
index 0324e3a62e4c..0e178b25b5a8 100644
--- a/sci-libs/openblas/openblas-0.3.23.ebuild
+++ b/sci-libs/openblas/openblas-0.3.23.ebuild
@@ -28,6 +28,7 @@ BDEPEND="virtual/pkgconfig"
 PATCHES=(
 	"${FILESDIR}/${PN}-0.3.23-shared-blas-lapack.patch"
 	"${FILESDIR}/${PN}-0.3.21-fix-loong.patch"
+	"${FILESDIR}/${PN}-0.3.23-parallel-make.patch"
 )
 
 pkg_pretend() {
@@ -132,8 +133,7 @@ src_compile() {
 }
 
 src_test() {
-	# https://github.com/xianyi/OpenBLAS/issues/4139
-	emake -j1 tests
+	emake tests
 }
 
 src_install() {