Fix C compiler handling and BINARY=32 mode in CMAKE builds (#2248)

* Fix compiler identification and option setting

* Handle BINARY=32 option on X86_64

* Add xGEMM3M unroll parameters for crossbuild-target CORE2

* Replace bogus mingw64/32bit CI job with actual 32bit build

mingw64 is not multilib-capable, so using an x86_64-mingw with BINARY=32 in the CI was not going to work anyway (but build passed while BINARY=32 was ignored).

appveyor.yml

@@ -38,7 +38,8 @@ environment:
     - COMPILER: MinGW64-gcc-7.2.0-mingw
       DYNAMIC_ARCH: OFF
       WITH_FORTRAN: ignore
-    - COMPILER: MinGW64-gcc-7.2.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      COMPILER: MinGW-gcc-6.3.0-32   
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       COMPILER: MinGW-gcc-5.3.0
       WITH_FORTRAN: ignore
@@ -62,10 +63,10 @@ before_build:
   - set PATH=%PATH:C:\Program Files\Git\usr\bin;=%
   - if [%COMPILER%]==[MinGW-gcc-5.3.0] set PATH=C:\MinGW\bin;C:\msys64\usr\bin;C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;%PATH%
   - if [%COMPILER%]==[MinGW64-gcc-7.2.0-mingw] set PATH=C:\MinGW\bin;C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;%PATH%
-  - if [%COMPILER%]==[MinGW64-gcc-7.2.0] set PATH=C:\msys64\usr\bin;C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;%PATH%
+  - if [%COMPILER%]==[MinGW-gcc-6.3.0-32] set PATH=C:\msys64\usr\bin;C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw64\bin;%PATH%
   - if [%COMPILER%]==[cl] cmake -G "Visual Studio 15 2017 Win64" ..
   - if [%COMPILER%]==[MinGW64-gcc-7.2.0-mingw] cmake -G "MinGW Makefiles" -DNOFORTRAN=1 ..
-  - if [%COMPILER%]==[MinGW64-gcc-7.2.0] cmake -G "MSYS Makefiles"  -DBINARY=32 -DNOFORTRAN=1 ..
+  - if [%COMPILER%]==[MinGW-gcc-6.3.0-32] cmake -G "MSYS Makefiles" -DNOFORTRAN=1 ..
   - if [%COMPILER%]==[MinGW-gcc-5.3.0] cmake -G "MSYS Makefiles" -DNOFORTRAN=1 ..
   - if [%WITH_FORTRAN%]==[no] cmake -G "Ninja" -DCMAKE_CXX_COMPILER=clang-cl -DCMAKE_C_COMPILER=clang-cl -DMSVC_STATIC_CRT=ON ..
   - if [%WITH_FORTRAN%]==[yes] cmake -G "Ninja" -DCMAKE_CXX_COMPILER=clang-cl -DCMAKE_C_COMPILER=clang-cl -DCMAKE_Fortran_COMPILER=flang -DBUILD_WITHOUT_LAPACK=no -DNOFORTRAN=0 ..

cmake/cc.cmake

@@ -3,7 +3,7 @@
 ## Description: Ported from portion of OpenBLAS/Makefile.system
 ##              Sets C related variables.
 
-if (${CMAKE_C_COMPILER} STREQUAL "GNU" OR ${CMAKE_C_COMPILER} STREQUAL "LSB" OR ${CMAKE_C_COMPILER} STREQUAL "Clang")
+if (${CMAKE_C_COMPILER_ID} STREQUAL "GNU" OR ${CMAKE_C_COMPILER_ID} STREQUAL "LSB" OR ${CMAKE_C_COMPILER_ID} MATCHES "Clang")
 
   set(CCOMMON_OPT "${CCOMMON_OPT} -Wall")
   set(COMMON_PROF "${COMMON_PROF} -fno-inline")
@@ -43,7 +43,7 @@ if (${CMAKE_C_COMPILER} STREQUAL "GNU" OR ${CMAKE_C_COMPILER} STREQUAL "LSB" OR
   endif ()
 endif ()
 
-if (${CMAKE_C_COMPILER} STREQUAL "PGI")
+if (${CMAKE_C_COMPILER_ID} STREQUAL "PGI")
   if (BINARY64)
     set(CCOMMON_OPT "${CCOMMON_OPT} -tp p7-64")
   else ()
@@ -51,7 +51,7 @@ if (${CMAKE_C_COMPILER} STREQUAL "PGI")
   endif ()
 endif ()
 
-if (${CMAKE_C_COMPILER} STREQUAL "PATHSCALE")
+if (${CMAKE_C_COMPILER_ID} STREQUAL "PATHSCALE")
   if (BINARY64)
     set(CCOMMON_OPT "${CCOMMON_OPT} -m64")
   else ()
@@ -59,7 +59,7 @@ if (${CMAKE_C_COMPILER} STREQUAL "PATHSCALE")
   endif ()
 endif ()
 
-if (${CMAKE_C_COMPILER} STREQUAL "OPEN64")
+if (${CMAKE_C_COMPILER_ID} STREQUAL "OPEN64")
 
   if (MIPS64)
 
@@ -87,7 +87,7 @@ if (${CMAKE_C_COMPILER} STREQUAL "OPEN64")
   endif ()
 endif ()
 
-if (${CMAKE_C_COMPILER} STREQUAL "SUN")
+if (${CMAKE_C_COMPILER_ID} STREQUAL "SUN")
   set(CCOMMON_OPT "${CCOMMON_OPT} -w")
   if (X86)
     set(CCOMMON_OPT "${CCOMMON_OPT} -m32")

cmake/prebuild.cmake

@@ -133,6 +133,10 @@ if (DEFINED CORE AND CMAKE_CROSSCOMPILING AND NOT (${HOST_OS} STREQUAL "WINDOWSS
       set(CGEMM_UNROLL_N 2)
       set(ZGEMM_UNROLL_M 2)
       set(ZGEMM_UNROLL_N 2)
+      set(CGEMM3M_UNROLL_M 8)
+      set(CGEMM3M_UNROLL_N 4)
+      set(ZGEMM3M_UNROLL_M 4)
+      set(ZGEMM3M_UNROLL_N 4)
   elseif ("${TCORE}" STREQUAL "ARMV7")
     file(APPEND ${TARGET_CONF_TEMP}
       "#define L1_DATA_SIZE\t65536\n"

cmake/system_check.cmake

@@ -39,10 +39,18 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc.*|power.*|Power.*")
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "mips64.*")
   set(MIPS64 1)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*")
-  if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
-    set(X86_64 1)
+  if (NOT BINARY)
+    if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
+      set(X86_64 1)
+    else()
+      set(X86 1)
+    endif()
   else()
-    set(X86 1)
+    if (${BINARY} EQUAL "64")
+       set(X86_64 1)
+    else ()
+       set(X86 1)
+    endif()
   endif()
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686.*|i386.*|x86.*|amd64.*|AMD64.*")
   set(X86 1)
@@ -54,6 +62,22 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
   else()
     set(ARM 1)
   endif()
+elseif (${CMAKE_CROSSCOMPILING})
+   if (${TARGET} STREQUAL "CORE2")
+    if (NOT BINARY)
+       set(X86 1)
+    elseif (${BINARY} EQUAL "64")
+       set(X86_64 1)
+    else ()
+       set(X86 1)
+    endif()
+   elseif (${TARGET} STREQUAL "ARMV7")
+       set(ARM 1)
+   else()
+       set(ARM64 1)
+   endif ()
+else ()
+   message(WARNING "Target ARCH could not be determined, got \"${CMAKE_SYSTEM_PROCESSOR}\"")
 endif()
 
 if (X86_64)
@@ -92,4 +116,3 @@ set (CCOMMON_OPT "${CCOMMON_OPT} -DNO_AVX512")
 endif()
   file(REMOVE "avx512.tmp" "avx512.o")
 endif()
-