linpack: Build both sp and dp binaries

This eases out running single-precision and double-precision benchmarks.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-benchmark/linpack/linpack/0001-linpack-Define-DP-only-when-SP-is-not-defined.patch

@@ -0,0 +1,32 @@
+From f092d4be22acd09e791187b8e9bff6d312721ce4 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 10 Nov 2021 11:36:31 -0800
+Subject: [PATCH] linpack: Define DP only when SP is not defined
+
+This helps compiling two versions ( SP/FP ) of the benchmark just by
+passing -DSP on compile cmdline
+
+Upstream-Status: Pending
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ linpacknew.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/linpacknew.c b/linpacknew.c
+index 17b2824..c656082 100644
+--- a/linpacknew.c
++++ b/linpacknew.c
+@@ -28,7 +28,9 @@
+ #include <time.h>
+ #include <float.h>
+
++#ifndef SP
+ #define DP
++#endif
+
+ #ifdef SP
+ #define ZERO        0.0
+-- 
+2.33.1
+

meta-oe/recipes-benchmark/linpack/linpack_1.0.bb

@@ -4,17 +4,21 @@ SUMMARY = "LINPACK is a software library for performing numerical linear algebra
 LICENSE = "PD"
 LIC_FILES_CHKSUM ="file://${WORKDIR}/linpacknew.c;beginline=1;endline=23;md5=aa025e3bc44190c71e4c5e3b084fed87"
 
-SRC_URI = "http://www.netlib.org/benchmark/linpackc.new;downloadfilename=linpacknew.c"
+SRC_URI = "http://www.netlib.org/benchmark/linpackc.new;downloadfilename=linpacknew.c \
+           file://0001-linpack-Define-DP-only-when-SP-is-not-defined.patch \
+          "
 SRC_URI[md5sum] = "1c5d0b6a31264685d2e651c920e3cdf4"
 SRC_URI[sha256sum] = "a63f2ec86512959f1fd926bfafb85905b2d7b7402942ffae3af374d48745e97e"
 
 S = "${WORKDIR}"
 
 do_compile () {
-	${CC} ${CFLAGS} ${LDFLAGS} -o linpack linpacknew.c -lm
+	${CC} ${CFLAGS} ${LDFLAGS} -DDP -o linpack_dp linpacknew.c -lm
+	${CC} ${CFLAGS} ${LDFLAGS} -DSP -o linpack_sp linpacknew.c -lm
 }
 
 do_install () {
-	install -Dm 0755 linpack ${D}${bindir}/linpack
+	install -Dm 0755 linpack_dp ${D}${bindir}/linpack_dp
+	install -Dm 0755 linpack_sp ${D}${bindir}/linpack_sp
 }