1From 4d3829fa52240c2b7e48770ab19584db33ba7863 Mon Sep 17 00:00:00 2001 2From: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> 3Date: Fri, 5 Mar 2021 11:17:59 +0100 4Subject: [PATCH] Makefile: fix support for passing FFLAGS on the make 5 command line 6 7When openblas is built while passing FFLAGS on the make command line, the 8compilation of lapack objects will not contain the flags specified in 9Makefile but _only_ those passed in FFLAGS. 10 11This can lead to build failure, e.g. because -fPIC is not passed to the 12compilation of most lapack objects, but is given to the link command: 13 14.../buildroot/output/host/bin/x86_64-linux-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -O2 -DMAX_STACK_ALLOC=2048 -Wall -m64 -DF_INTERFACE_GFORT -fPIC -DNO_WARMUP -DMAX_CPU_NUMBER=4 -DMAX_PARALLEL_NUMBER=1 -DVERSION=\"0.3.9\" -DASMNAME= -DASMFNAME=_ -DNAME=_ -DCNAME= -DCHAR_NAME=\"_\" -DCHAR_CNAME=\"\" -DNO_AFFINITY -I.. -shared -o ../libopenblas_nehalem-r0.3.9.so \ 15-Wl,--whole-archive ../libopenblas_nehalem-r0.3.9.a -Wl,--no-whole-archive \ 16-Wl,-soname,libopenblas.so.0 -lm -lgfortran -lm -lgfortran 17.../buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/x86_64-buildroot-linux-musl/9.3.0/../../../../x86_64-buildroot-linux-musl/bin/ld: ../libopenblas_nehalem-r0.3.9.a(sbdsvdx.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC 18 19In the initial support for this principle, added in commit 20d0e731e8b825e7a554f245aa8f1118dcec9e2728, the flags specified in the 21makefile were appended to the flags specified on the command-line. 22 23Fix this situation by using 'override' for 'FFLAGS' in 24lapack-netlib/make.inc. The flags passed on the command-line are already 25part of the LAPACK_FFLAGS variable, so no '+=' is needed here. 26 27Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> 28--- 29 Makefile | 2 +- 30 1 file changed, 1 insertion(+), 1 deletion(-) 31 32diff --git a/Makefile b/Makefile 33index fc5fe3f5..8ae1ff47 100644 34--- a/Makefile 35+++ b/Makefile 36@@ -248,7 +248,7 @@ prof_lapack : lapack_prebuild 37 lapack_prebuild : 38 ifeq ($(NOFORTRAN), $(filter 0,$(NOFORTRAN))) 39 -@echo "FC = $(FC)" > $(NETLIB_LAPACK_DIR)/make.inc 40- -@echo "FFLAGS = $(LAPACK_FFLAGS)" >> $(NETLIB_LAPACK_DIR)/make.inc 41+ -@echo "override FFLAGS = $(LAPACK_FFLAGS)" >> $(NETLIB_LAPACK_DIR)/make.inc 42 -@echo "POPTS = $(LAPACK_FPFLAGS)" >> $(NETLIB_LAPACK_DIR)/make.inc 43 -@echo "FFLAGS_NOOPT = -O0 $(LAPACK_NOOPT)" >> $(NETLIB_LAPACK_DIR)/make.inc 44 -@echo "PNOOPT = $(LAPACK_FPFLAGS) -O0" >> $(NETLIB_LAPACK_DIR)/make.inc 45-- 462.26.2 47 48