Fix the CMake build on systems that lack a C++ compiler.

libarchive doesn't need C++, so we should be able to build
on systems that don't have a C++ compiler.

SVN-Revision: 1071

CMakeLists.txt

@@ -1,6 +1,6 @@
 #
 #
-PROJECT(libarchive)
+PROJECT(libarchive C)
 #
 CMAKE_MINIMUM_REQUIRED(VERSION 2.6.1)
 SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/build/cmake")

build/cmake/CheckFileOffsetBits.cmake

@@ -13,7 +13,7 @@
 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
 
 
-INCLUDE(CheckCXXSourceCompiles)
+#INCLUDE(CheckCXXSourceCompiles)
 
 MACRO (CHECK_FILE_OFFSET_BITS)
 

build/cmake/CheckStructMember.cmake

@@ -19,7 +19,7 @@
 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
 
 
-INCLUDE(CheckCXXSourceCompiles)
+INCLUDE(CheckCSourceCompiles)
 
 MACRO (CHECK_STRUCT_MEMBER _STRUCT _MEMBER _HEADER _RESULT)
    SET(_INCLUDE_FILES)
@@ -37,7 +37,7 @@ int main()
   return 0;
 }
 ")
-   CHECK_CXX_SOURCE_COMPILES("${_CHECK_STRUCT_MEMBER_SOURCE_CODE}" ${_RESULT})
+   CHECK_C_SOURCE_COMPILES("${_CHECK_STRUCT_MEMBER_SOURCE_CODE}" ${_RESULT})
 
 ENDMACRO (CHECK_STRUCT_MEMBER)
 

build/cmake/CheckTypeExists.cmake

@@ -18,7 +18,7 @@
 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
 
 
-INCLUDE(CheckCXXSourceCompiles)
+INCLUDE(CheckCSourceCompiles)
 
 MACRO (CHECK_TYPE_EXISTS _TYPE _HEADER _RESULT)
    SET(_INCLUDE_FILES)
@@ -36,7 +36,7 @@ int main()
   return 0;
 }
 ")
-   CHECK_CXX_SOURCE_COMPILES("${_CHECK_TYPE_EXISTS_SOURCE_CODE}" ${_RESULT})
+   CHECK_C_SOURCE_COMPILES("${_CHECK_TYPE_EXISTS_SOURCE_CODE}" ${_RESULT})
 
 ENDMACRO (CHECK_TYPE_EXISTS)