X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e08142f6b96c100165667fe1b647a28b6357b5ed..b9625f82f86db0674e911887addce45dca31b57f:/tools/cmake/Flags.cmake

diff --git a/tools/cmake/Flags.cmake b/tools/cmake/Flags.cmake
index 1c4b9a6e4a..4cf24372c2 100644
--- a/tools/cmake/Flags.cmake
+++ b/tools/cmake/Flags.cmake
@@ -119,7 +119,7 @@ if(enable_lto) # User wants LTO. Try if we can do that
       endif()
     else()
       include(CheckIPOSupported)
-      check_ipo_supported(RESULT ipo)
+      check_ipo_supported(RESULT ipo LANGUAGES C CXX)
       if(ipo)
         set(enable_lto ON)
       endif()
@@ -148,6 +148,16 @@ if(enable_lto) # User wants LTO, and it seems usable. Go for it
     list(APPEND CMAKE_C_COMPILE_OPTIONS_IPO "-flto=${LTO_EXTRA_FLAG}")
     list(APPEND CMAKE_CXX_COMPILE_OPTIONS_IPO "-flto=${LTO_EXTRA_FLAG}")
   endif()
+
+  # Activate fat-lto-objects in case LD and gfortran differ too much.
+  # Only test with GNU as it's the only case I know (clang+gfortran+lld)
+  execute_process(COMMAND ${CMAKE_LINKER} -v OUTPUT_VARIABLE LINKER_ID ERROR_VARIABLE LINKER_ID)
+  string(REGEX MATCH "GNU" LINKER_ID "${LINKER_ID}")
+  if(${CMAKE_Fortran_COMPILER_ID} MATCHES "GNU"
+     AND NOT "${LINKER_ID}" MATCHES "GNU")
+       list(APPEND CMAKE_Fortran_COMPILE_OPTIONS_IPO "-ffat-lto-objects")
+  endif()
+
   # "Since version 4.9 gcc produces slim object files that only contain
   # the intermediate representation. In order to handle archives of
   # these objects you have to use the gcc wrappers:
@@ -188,7 +198,7 @@ endif()
 set(CMAKE_C_FLAGS   "${warnCFLAGS} ${CMAKE_C_FLAGS}   ${optCFLAGS}")
 set(CMAKE_CXX_FLAGS "${warnCXXFLAGS} ${CMAKE_CXX_FLAGS} ${optCFLAGS}")
 
-# Try to make Mac a bit more complient to open source standards
+# Try to make Mac a bit more compliant to open source standards
 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
 endif()
@@ -200,7 +210,7 @@ endif()
 
 set(TESH_OPTION "")
 if(enable_coverage)
-  find_program(GCOV_PATH gcov)
+  find_program(GCOV_PATH NAMES ENV{GCOV} gcov)
   if(GCOV_PATH)
     set(COVERAGE_COMMAND "${GCOV_PATH}" CACHE TYPE FILEPATH FORCE)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCOVERAGE")