1 files changed, 47 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/build/cmake/CheckFuncs.cmake b/Utilities/cmlibarchive/build/cmake/CheckFuncs.cmake
new file mode 100644
index 0000000..923c693
--- /dev/null
+++ b/Utilities/cmlibarchive/build/cmake/CheckFuncs.cmake
@@ -0,0 +1,47 @@
+# Check if the system has the specified function; treat glibc "stub"
+# functions as nonexistent:
+# CHECK_FUNCTION_EXISTS_GLIBC (FUNCTION FUNCVAR)
+#
+#  FUNCTION - the function(s) where the prototype should be declared
+#  FUNCVAR - variable to define if the function does exist
+#
+# In particular, this understands the glibc convention of
+# defining macros __stub_XXXX or __stub___XXXX if the function
+# does appear in the library but is merely a stub that does nothing.
+# By detecting this case, we can select alternate behavior on
+# platforms that don't support this functionality.
+#
+# The following variables may be set before calling this macro to
+# modify the way the check is run:
+#
+#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
+#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
+#  CMAKE_REQUIRED_INCLUDES = list of include directories
+# Copyright (c) 2009, Michihiro NAKAJIMA
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+INCLUDE(CheckFunctionExists)
+
+MACRO (CHECK_FUNCTION_EXISTS_GLIBC _FUNC _FUNCVAR)
+  IF(NOT DEFINED ${_FUNCVAR})
+   SET(CHECK_STUB_FUNC_1 "__stub_${_FUNC}")
+   SET(CHECK_STUB_FUNC_2 "__stub___${_FUNC}")
+   CONFIGURE_FILE( ${libarchive_SOURCE_DIR}/build/cmake/CheckFuncs_stub.c.in
+     ${CMAKE_BINARY_DIR}/cmake.tmp/CheckFuncs_stub.c IMMEDIATE)
+   TRY_COMPILE(__stub
+     ${CMAKE_BINARY_DIR}
+     ${CMAKE_BINARY_DIR}/cmake.tmp/CheckFuncs_stub.c
+     COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+     CMAKE_FLAGS
+     -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILE_FLAGS}
+     "${CHECK_INCLUDE_FILE_C_INCLUDE_DIRS}")
+   IF (__stub)
+     SET("${_FUNCVAR}" "" CACHE INTERNAL "Have function ${_FUNC}")
+   ELSE (__stub)
+     CHECK_FUNCTION_EXISTS("${_FUNC}" "${_FUNCVAR}")
+   ENDIF (__stub)
+   ENDIF(NOT DEFINED ${_FUNCVAR})
+ENDMACRO (CHECK_FUNCTION_EXISTS_GLIBC)
+