openblas: fix build failure for MIPS n32

Support for n32 ABI in OpenBLAS is not complete. Adding a patch to fix
this problem.

This patch has been sent upstream as a pull request:

  https://github.com/xianyi/OpenBLAS/pull/926

Fixes:

  http://autobuild.buildroot.net/results/1e8/1e8506a0d7b4fe1b773535f7d23ca422c03f9770/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/package/openblas/0001-Complete-support-for-MIPS-n32-ABI.patch b/package/openblas/0001-Complete-support-for-MIPS-n32-ABI.patch
new file mode 100644 (file)
index 0000000..6e6c5a6
--- /dev/null
+++ b/package/openblas/0001-Complete-support-for-MIPS-n32-ABI.patch
@@ -0,0 +1,116 @@
+From 7f28cd1f88145a701e5dbbf50558bb65fce79f61 Mon Sep 17 00:00:00 2001
+From: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
+Date: Thu, 14 Jul 2016 17:20:51 +0100
+Subject: [PATCH] Complete support for MIPS n32 ABI
+
+Pull request: https://github.com/xianyi/OpenBLAS/pull/926
+
+Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
+---
+ Makefile.system | 27 +++++++++------------------
+ c_check         |  9 +++++++--
+ f_check         |  7 ++++++-
+ 3 files changed, 22 insertions(+), 21 deletions(-)
+
+diff --git a/Makefile.system b/Makefile.system
+index 24a7a64..bbcdb82 100644
+--- a/Makefile.system
++++ b/Makefile.system
+@@ -502,13 +502,16 @@ endif
+ 
+ ifdef NO_BINARY_MODE
+ 
+-ifeq ($(ARCH), $(filter $(ARCH),mips64 mips))
++ifeq ($(ARCH), $(filter $(ARCH),mips64))
+ ifdef BINARY64
+ CCOMMON_OPT += -mabi=64
+ else
+-CCOMMON_OPT += -mabi=32
++CCOMMON_OPT += -mabi=n32
+ endif
+ BINARY_DEFINED = 1
++else ifeq ($(ARCH), $(filter $(ARCH),mips))
++CCOMMON_OPT += -mabi=32
++BINARY_DEFINED = 1
+ endif
+ 
+ ifeq ($(CORE), LOONGSON3A)
+@@ -599,12 +602,14 @@ ifneq ($(NO_LAPACK), 1)
+ EXTRALIB += -lgfortran
+ endif
+ ifdef NO_BINARY_MODE
+-ifeq ($(ARCH), $(filter $(ARCH),mips64 mips))
++ifeq ($(ARCH), $(filter $(ARCH),mips64))
+ ifdef BINARY64
+ FCOMMON_OPT += -mabi=64
+ else
+-FCOMMON_OPT += -mabi=32
++FCOMMON_OPT += -mabi=n32
+ endif
++else ifeq ($(ARCH), $(filter $(ARCH),mips))
++FCOMMON_OPT += -mabi=32
+ endif
+ else
+ ifdef BINARY64
+@@ -688,20 +693,6 @@ endif
+ endif
+ endif
+ 
+-ifeq ($(filter $(ARCH),mips64 mips))
+-ifndef BINARY64
+-FCOMMON_OPT += -m32
+-else
+-FCOMMON_OPT += -m64
+-endif
+-else
+-ifdef BINARY64
+-FCOMMON_OPT += -mabi=64
+-else
+-FCOMMON_OPT += -mabi=32
+-endif
+-endif
+-
+ ifeq ($(USE_OPENMP), 1)
+ FCOMMON_OPT += -mp
+ endif
+diff --git a/c_check b/c_check
+index 50ff360..9f457df 100644
+--- a/c_check
++++ b/c_check
+@@ -79,8 +79,13 @@ if ($os eq "AIX") {
+     $defined = 1;
+ }
+ 
+-if (($architecture eq "mips") || ($architecture eq "mips64")) {
+-    $compiler_name .= " -mabi=32" if ($binary eq "32");
++if ($architecture eq "mips") {
++    $compiler_name .= " -mabi=32";
++    $defined = 1;
++}
++
++if ($architecture eq "mips64") {
++    $compiler_name .= " -mabi=n32" if ($binary eq "32");
+     $compiler_name .= " -mabi=64" if ($binary eq "64");
+     $defined = 1;
+ }
+diff --git a/f_check b/f_check
+index 4c03ac7..3520e8b 100644
+--- a/f_check
++++ b/f_check
+@@ -223,7 +223,12 @@ if (!$?) {
+       }
+        #For gfortran MIPS
+       if ($?) {
+-          $link = `$compiler $openmp -mabi=32 -v ftest2.f 2>&1 && rm -f a.out a.exe`;
++            $mips_data = `$compiler_bin -E -dM - < /dev/null`;
++            if ($mips_data =~ /_MIPS_ISA_MIPS64/) {
++              $link = `$compiler $openmp -mabi=n32 -v ftest2.f 2>&1 && rm -f a.out a.exe`;
++          } else {
++              $link = `$compiler $openmp -mabi=32 -v ftest2.f 2>&1 && rm -f a.out a.exe`;
++          }
+       }
+       $binary = "" if ($?);
+     }
+-- 
+2.7.3
+