Merge pull request #4513 from libgit2/ethomson/cmake_fixes

CMake: minor fixups

4 files changed, 63 insertions, 60 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d5ad9d05..53f10ba94 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,9 +14,12 @@
 PROJECT(libgit2 C)
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8.11)
 CMAKE_POLICY(SET CMP0015 NEW)
-IF (NOT CMAKE_VERSION VERSION_LESS 3.1)
+IF (POLICY CMP0051)
 	CMAKE_POLICY(SET CMP0051 NEW)
 ENDIF()
+IF (POLICY CMP0042)
+	CMAKE_POLICY(SET CMP0042 NEW)
+ENDIF()
 
 # Add find modules to the path
 SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${libgit2_SOURCE_DIR}/cmake/Modules/")
@@ -28,7 +31,10 @@ INCLUDE(CheckStructHasMember)
 INCLUDE(AddCFlagIfSupported)
 INCLUDE(FindPkgConfig)
 INCLUDE(FindThreads)
+INCLUDE(FindStatNsec)
+INCLUDE(IdeSplitSources)
 INCLUDE(FeatureSummary)
+INCLUDE(EnableWarnings)
 
 # Build options
 #
@@ -91,50 +97,6 @@ IF(MSVC)
 	OPTION(MSVC_CRTDBG "Enable CRTDBG memory leak reporting" OFF)
 ENDIF()
 
-CHECK_STRUCT_HAS_MEMBER ("struct stat" st_mtim "sys/types.h;sys/stat.h"
-	HAVE_STRUCT_STAT_ST_MTIM LANGUAGE C)
-CHECK_STRUCT_HAS_MEMBER ("struct stat" st_mtimespec "sys/types.h;sys/stat.h"
-	HAVE_STRUCT_STAT_ST_MTIMESPEC LANGUAGE C)
-CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtime_nsec sys/stat.h
-	HAVE_STRUCT_STAT_MTIME_NSEC LANGUAGE C)
-
-IF (HAVE_STRUCT_STAT_ST_MTIM)
-	CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtim.tv_nsec sys/stat.h
-		HAVE_STRUCT_STAT_NSEC LANGUAGE C)
-ELSEIF (HAVE_STRUCT_STAT_ST_MTIMESPEC)
-	CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtimespec.tv_nsec sys/stat.h
-		HAVE_STRUCT_STAT_NSEC LANGUAGE C)
-ELSE ()
-	SET( HAVE_STRUCT_STAT_NSEC ON )
-ENDIF()
-
-IF (HAVE_STRUCT_STAT_NSEC OR WIN32)
-	OPTION( USE_NSEC		"Care about sub-second file mtimes and ctimes"	ON  )
-ENDIF()
-
-# This function splits the sources files up into their appropriate
-# subdirectories.  This is especially useful for IDEs like Xcode and
-# Visual Studio, so that you can navigate into the libgit2_clar project,
-# and see the folders within the tests folder (instead of just seeing all
-# source and tests in a single folder.)
-FUNCTION(IDE_SPLIT_SOURCES target)
-	IF(MSVC_IDE OR CMAKE_GENERATOR STREQUAL Xcode)
-		GET_TARGET_PROPERTY(sources ${target} SOURCES)
-		FOREACH(source ${sources})
-			IF(source MATCHES ".*/")
-				STRING(REPLACE ${libgit2_SOURCE_DIR}/ "" rel ${source})
-				IF(rel)
-					STRING(REGEX REPLACE "/([^/]*)$" "" rel ${rel})
-					IF(rel)
-						STRING(REPLACE "/" "\\\\" rel ${rel})
-						SOURCE_GROUP(${rel} FILES ${source})
-					ENDIF()
-				ENDIF()
-			ENDIF()
-		ENDFOREACH()
-	ENDIF()
-ENDFUNCTION()
-
 FILE(STRINGS "${libgit2_SOURCE_DIR}/include/git2/version.h" GIT2_HEADER REGEX "^#define LIBGIT2_VERSION \"[^\"]*\"$")
 
 STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"([0-9]+).*$" "\\1" LIBGIT2_VERSION_MAJOR "${GIT2_HEADER}")
@@ -230,21 +192,6 @@ ELSE ()
 
 	SET(CMAKE_C_FLAGS "-D_GNU_SOURCE ${CMAKE_C_FLAGS}")
 
-	MACRO(ENABLE_WARNINGS flag)
-		IF(ENABLE_WERROR)
-			ADD_C_FLAG_IF_SUPPORTED(-Werror=${flag})
-		ELSE()
-			ADD_C_FLAG_IF_SUPPORTED(-W${flag})
-		ENDIF()
-	ENDMACRO()
-
-	MACRO(DISABLE_WARNINGS flag)
-		ADD_C_FLAG_IF_SUPPORTED(-Wno-${flag})
-		IF(ENABLE_WERROR)
-			ADD_C_FLAG_IF_SUPPORTED(-Wno-error=${flag})
-		ENDIF()
-	ENDMACRO()
-
 	ENABLE_WARNINGS(all)
 	ENABLE_WARNINGS(extra)
 
diff --git a/cmake/Modules/EnableWarnings.cmake b/cmake/Modules/EnableWarnings.cmake
new file mode 100644
index 000000000..e7d7d3986
--- /dev/null
+++ b/cmake/Modules/EnableWarnings.cmake
@@ -0,0 +1,14 @@
+MACRO(ENABLE_WARNINGS flag)
+	IF(ENABLE_WERROR)
+		ADD_C_FLAG_IF_SUPPORTED(-Werror=${flag})
+	ELSE()
+		ADD_C_FLAG_IF_SUPPORTED(-W${flag})
+	ENDIF()
+ENDMACRO()
+
+MACRO(DISABLE_WARNINGS flag)
+	ADD_C_FLAG_IF_SUPPORTED(-Wno-${flag})
+	IF(ENABLE_WERROR)
+		ADD_C_FLAG_IF_SUPPORTED(-Wno-error=${flag})
+	ENDIF()
+ENDMACRO()
diff --git a/cmake/Modules/FindStatNsec.cmake b/cmake/Modules/FindStatNsec.cmake
new file mode 100644
index 000000000..fa550a214
--- /dev/null
+++ b/cmake/Modules/FindStatNsec.cmake
@@ -0,0 +1,20 @@
+CHECK_STRUCT_HAS_MEMBER ("struct stat" st_mtim "sys/types.h;sys/stat.h"
+	HAVE_STRUCT_STAT_ST_MTIM LANGUAGE C)
+CHECK_STRUCT_HAS_MEMBER ("struct stat" st_mtimespec "sys/types.h;sys/stat.h"
+	HAVE_STRUCT_STAT_ST_MTIMESPEC LANGUAGE C)
+CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtime_nsec sys/stat.h
+	HAVE_STRUCT_STAT_MTIME_NSEC LANGUAGE C)
+
+IF (HAVE_STRUCT_STAT_ST_MTIM)
+	CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtim.tv_nsec sys/stat.h
+		HAVE_STRUCT_STAT_NSEC LANGUAGE C)
+ELSEIF (HAVE_STRUCT_STAT_ST_MTIMESPEC)
+	CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtimespec.tv_nsec sys/stat.h
+		HAVE_STRUCT_STAT_NSEC LANGUAGE C)
+ELSE ()
+	SET( HAVE_STRUCT_STAT_NSEC ON )
+ENDIF()
+
+IF (HAVE_STRUCT_STAT_NSEC OR WIN32)
+	OPTION( USE_NSEC		"Care about sub-second file mtimes and ctimes"	ON  )
+ENDIF()
diff --git a/cmake/Modules/IdeSplitSources.cmake b/cmake/Modules/IdeSplitSources.cmake
new file mode 100644
index 000000000..e2e09b4ce
--- /dev/null
+++ b/cmake/Modules/IdeSplitSources.cmake
@@ -0,0 +1,22 @@
+# This function splits the sources files up into their appropriate
+# subdirectories.  This is especially useful for IDEs like Xcode and
+# Visual Studio, so that you can navigate into the libgit2_clar project,
+# and see the folders within the tests folder (instead of just seeing all
+# source and tests in a single folder.)
+FUNCTION(IDE_SPLIT_SOURCES target)
+	IF(MSVC_IDE OR CMAKE_GENERATOR STREQUAL Xcode)
+		GET_TARGET_PROPERTY(sources ${target} SOURCES)
+		FOREACH(source ${sources})
+			IF(source MATCHES ".*/")
+				STRING(REPLACE ${libgit2_SOURCE_DIR}/ "" rel ${source})
+				IF(rel)
+					STRING(REGEX REPLACE "/([^/]*)$" "" rel ${rel})
+					IF(rel)
+						STRING(REPLACE "/" "\\\\" rel ${rel})
+						SOURCE_GROUP(${rel} FILES ${source})
+					ENDIF()
+				ENDIF()
+			ENDIF()
+		ENDFOREACH()
+	ENDIF()
+ENDFUNCTION()