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authorRolf Eike Beer <eike@sf-mail.de>2014-10-06 19:26:49 (GMT)
committerRolf Eike Beer <eike@sf-mail.de>2014-10-06 19:30:09 (GMT)
commit46368eddfdca1ee83a0126e4b3dfde575125f3e1 (patch)
treedd71ac41cea42a72f9ed8467105252aaf6d886f2 /Modules/FindThreads.cmake
parent3f9191932262f2279a7d25bf0dbb2fc224bd27cb (diff)
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FindThreads: move checking of the -pthread compiler flag into a macro
This allows a following commit to introduce a switch to prefer that check over searching for the explicit library names without breaking backward compatibility.
Diffstat (limited to 'Modules/FindThreads.cmake')
-rw-r--r--Modules/FindThreads.cmake78
1 files changed, 42 insertions, 36 deletions
diff --git a/Modules/FindThreads.cmake b/Modules/FindThreads.cmake
index 8be6613..aac9c0e 100644
--- a/Modules/FindThreads.cmake
+++ b/Modules/FindThreads.cmake
@@ -22,6 +22,7 @@
#=============================================================================
# Copyright 2002-2009 Kitware, Inc.
+# Copyright 2011-2014 Rolf Eike Beer <eike@sf-mail.de>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
@@ -48,7 +49,7 @@ endif()
# Internal helper macro.
# Do NOT even think about using it outside of this file!
macro(_check_threads_lib LIBNAME FUNCNAME VARNAME)
- if(NOT CMAKE_HAVE_THREADS_LIBRARY)
+ if(NOT Threads_FOUND)
CHECK_LIBRARY_EXISTS(${LIBNAME} ${FUNCNAME} "" ${VARNAME})
if(${VARNAME})
set(CMAKE_THREAD_LIBS_INIT "-l${LIBNAME}")
@@ -58,6 +59,45 @@ macro(_check_threads_lib LIBNAME FUNCNAME VARNAME)
endif ()
endmacro()
+# Internal helper macro.
+# Do NOT even think about using it outside of this file!
+macro(_check_pthreads_flag)
+ if(NOT Threads_FOUND)
+ # If we did not found -lpthread, -lpthread, or -lthread, look for -pthread
+ if(NOT DEFINED THREADS_HAVE_PTHREAD_ARG)
+ message(STATUS "Check if compiler accepts -pthread")
+ try_run(THREADS_PTHREAD_ARG THREADS_HAVE_PTHREAD_ARG
+ ${CMAKE_BINARY_DIR}
+ ${CMAKE_CURRENT_LIST_DIR}/CheckForPthreads.c
+ CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread
+ COMPILE_OUTPUT_VARIABLE OUTPUT)
+
+ if(THREADS_HAVE_PTHREAD_ARG)
+ if(THREADS_PTHREAD_ARG STREQUAL "2")
+ set(Threads_FOUND TRUE)
+ message(STATUS "Check if compiler accepts -pthread - yes")
+ else()
+ message(STATUS "Check if compiler accepts -pthread - no")
+ file(APPEND
+ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+ "Determining if compiler accepts -pthread returned ${THREADS_PTHREAD_ARG} instead of 2. The compiler had the following output:\n${OUTPUT}\n\n")
+ endif()
+ else()
+ message(STATUS "Check if compiler accepts -pthread - no")
+ file(APPEND
+ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+ "Determining if compiler accepts -pthread failed with the following output:\n${OUTPUT}\n\n")
+ endif()
+
+ endif()
+
+ if(THREADS_HAVE_PTHREAD_ARG)
+ set(Threads_FOUND TRUE)
+ set(CMAKE_THREAD_LIBS_INIT "-pthread")
+ endif()
+ endif()
+endmacro()
+
if(CMAKE_HAVE_SPROC_H AND NOT CMAKE_THREAD_PREFER_PTHREAD)
# We have sproc
set(CMAKE_USE_SPROC_INIT 1)
@@ -89,41 +129,7 @@ else()
endif()
endif()
- if(NOT CMAKE_HAVE_THREADS_LIBRARY)
- # If we did not found -lpthread, -lpthread, or -lthread, look for -pthread
- if("x${THREADS_HAVE_PTHREAD_ARG}" STREQUAL "x")
- message(STATUS "Check if compiler accepts -pthread")
- try_run(THREADS_PTHREAD_ARG THREADS_HAVE_PTHREAD_ARG
- ${CMAKE_BINARY_DIR}
- ${CMAKE_CURRENT_LIST_DIR}/CheckForPthreads.c
- CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread
- COMPILE_OUTPUT_VARIABLE OUTPUT)
-
- if(THREADS_HAVE_PTHREAD_ARG)
- if(THREADS_PTHREAD_ARG STREQUAL "2")
- set(Threads_FOUND TRUE)
- message(STATUS "Check if compiler accepts -pthread - yes")
- else()
- message(STATUS "Check if compiler accepts -pthread - no")
- file(APPEND
- ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
- "Determining if compiler accepts -pthread returned ${THREADS_PTHREAD_ARG} instead of 2. The compiler had the following output:\n${OUTPUT}\n\n")
- endif()
- else()
- message(STATUS "Check if compiler accepts -pthread - no")
- file(APPEND
- ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
- "Determining if compiler accepts -pthread failed with the following output:\n${OUTPUT}\n\n")
- endif()
-
- endif()
-
- if(THREADS_HAVE_PTHREAD_ARG)
- set(Threads_FOUND TRUE)
- set(CMAKE_THREAD_LIBS_INIT "-pthread")
- endif()
-
- endif()
+ _check_pthreads_flag()
endif()
endif()