Merge topic 'find_openacc_targets'

f4fc0667ae FindOpenACC: Provide import targets and OpenACC_<lang>_OPTIONS variable
9460501ad7 FindOpenACC: Provide a Fortran snippet that compiles with gfortran

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3670

1 files changed, 29 insertions, 3 deletions

diff --git a/Modules/FindOpenACC.cmake b/Modules/FindOpenACC.cmake
index dc8321d..743e0e2 100644
--- a/Modules/FindOpenACC.cmake
+++ b/Modules/FindOpenACC.cmake
@@ -22,6 +22,14 @@ project, where ``<lang>`` is one of C, CXX, or Fortran:
   Variable indicating if OpenACC support for ``<lang>`` was detected.
 ``OpenACC_<lang>_FLAGS``
   OpenACC compiler flags for ``<lang>``, separated by spaces.
+``OpenACC_<lang>_OPTIONS``
+  OpenACC compiler flags for ``<lang>``, as a list. Suitable for usage
+  with target_compile_options or target_link_options.
+
+Additionally, the module provides :prop_tgt:`IMPORTED` targets:
+
+``OpenACC::OpenACC_<lang>``
+  Target for using OpenACC from ``<lang>``.
 
 The module will also try to provide the OpenACC version variables:
 
@@ -60,9 +68,7 @@ int main(){
 set(OpenACC_Fortran_TEST_SOURCE
 "
 program test
-#ifdef _OPENACC
-  return 0;
-#else
+#ifndef _OPENACC
   breaks_on_purpose
 #endif
 endprogram test
@@ -241,6 +247,9 @@ foreach (LANG IN ITEMS C CXX Fortran)
     if(NOT DEFINED OpenACC_${LANG}_FLAGS)
       _OPENACC_GET_FLAGS("${LANG}" OpenACC_${LANG}_FLAGS)
     endif()
+    if(NOT DEFINED OpenACC_${LANG}_OPTIONS)
+      separate_arguments(OpenACC_${LANG}_OPTIONS NATIVE_COMMAND "${OpenACC_${LANG}_FLAGS}")
+    endif()
     _OPENACC_GET_SPEC_DATE("${LANG}" OpenACC_${LANG}_SPEC_DATE)
     _OPENACC_SET_VERSION_BY_SPEC_DATE("${LANG}")
 
@@ -251,6 +260,23 @@ foreach (LANG IN ITEMS C CXX Fortran)
   endif()
 endforeach()
 
+foreach (LANG IN ITEMS C CXX Fortran)
+  if(OpenACC_${LANG}_FOUND AND NOT TARGET OpenACC::OpenACC_${LANG})
+    add_library(OpenACC::OpenACC_${LANG} INTERFACE IMPORTED)
+  endif()
+  if(OpenACC_${LANG}_LIBRARIES)
+    set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
+      INTERFACE_LINK_LIBRARIES "${OpenACC_${LANG}_LIBRARIES}")
+  endif()
+  if(OpenACC_${LANG}_FLAGS)
+    set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
+      INTERFACE_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:${LANG}>:${OpenACC_${LANG}_OPTIONS}>")
+    set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
+      INTERFACE_LINK_OPTIONS "$<$<COMPILE_LANGUAGE:${LANG}>:${OpenACC_${LANG}_OPTIONS}>")
+    unset(_OpenACC_${LANG}_OPTIONS)
+  endif()
+endforeach()
+
 unset(OpenACC_C_CXX_TEST_SOURCE)
 unset(OpenACC_Fortran_TEST_SOURCE)
 unset(OpenACC_C_CXX_CHECK_VERSION_SOURCE)