Merge pull request #4915 from martin-frbg/issue4907

Support LoongArch64 compilation with LLVM

Makefile.system

@@ -1720,8 +1720,8 @@ LAPACK_FFLAGS := $(filter-out -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mskylake-avx
 override FFLAGS := $(filter-out -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mskylake-avx512 ,$(FFLAGS))
 endif
 ifeq ($(F_COMPILER),FLANGNEW)
-LAPACK_FFLAGS := $(filter-out -m32 -m64 -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mskylake-avx512 -mtune=% ,$(FFLAGS))
-override FFLAGS := $(filter-out -m32 -m64 -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mskylake-avx512 -mtune=% ,$(FFLAGS))
+LAPACK_FFLAGS := $(filter-out -m32 -m64 -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mskylake-avx512 -mtune=% -mabi=% ,$(FFLAGS))
+override FFLAGS := $(filter-out -m32 -m64 -msse3 -mssse3 -msse4.1 -mavx -mavx2 -mskylake-avx512 -mtune=% -mabi=% ,$(FFLAGS))
 endif
 
 LAPACK_CFLAGS = $(CFLAGS)

cmake/fc.cmake

@@ -61,21 +61,25 @@ if (${F_COMPILER} STREQUAL "GFORTRAN" OR ${F_COMPILER} STREQUAL "F95" OR CMAKE_F
     endif ()
     if (LOONGARCH64)
       if (BINARY64)
-	CHECK_C_COMPILER_FLAG("-mabi=lp64d" COMPILER_SUPPORT_LP64D_ABI)
-        if(COMPILER_SUPPORT_LP64D_ABI)
-	  set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=lp64d")
-	else()
-	  set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=lp64")
-	endif ()
+        if (NOT CMAKE_Fortran_COMPILER_ID MATCHES "LLVMFlang.*")
+	  CHECK_C_COMPILER_FLAG("-mabi=lp64d" COMPILER_SUPPORT_LP64D_ABI)
+          if(COMPILER_SUPPORT_LP64D_ABI)
+	    set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=lp64d")
+	  else()
+	    set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=lp64")
+	  endif ()
+        endif ()
         if (INTERFACE64) 
           set(FCOMMON_OPT "${FCOMMON_OPT} -fdefault-integer-8") 
         endif () 
       else ()
-	CHECK_C_COMPILER_FLAG("-mabi=ilp32d" COMPILER_SUPPORT_ILP32D_ABI)
-	if(COMPILER_SUPPORT_ILP32D_ABI)
-	  set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=ilp32d")
-	else()
-	  set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=lp32")
+        if (NOT CMAKE_Fortran_COMPILER_ID MATCHES "LLVMFlang.*")
+	  CHECK_C_COMPILER_FLAG("-mabi=ilp32d" COMPILER_SUPPORT_ILP32D_ABI)
+	  if(COMPILER_SUPPORT_ILP32D_ABI)
+	    set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=ilp32d")
+	  else()
+	    set(FCOMMON_OPT "${FCOMMON_OPT} -mabi=lp32")
+          endif ()
 	endif ()
       endif ()
     endif ()

common_loongarch64.h

@@ -281,9 +281,13 @@ REALNAME: ;\
 #define GNUSTACK
 #endif /* defined(__linux__) && defined(__ELF__) */
 
+#ifdef __clang__
+#define EPILOGUE .end
+#else
 #define EPILOGUE      \
     .end    REALNAME ;\
     GNUSTACK
+#endif
 
 #define PROFCODE