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--- a/CMake/VTKGenerateExportHeader.cmake 2020-05-24 14:33:12.154603698 -0600
+++ b/CMake/VTKGenerateExportHeader.cmake 2020-05-24 14:33:34.864603776 -0600
@@ -174,8 +174,12 @@
execute_process(COMMAND ${CMAKE_C_COMPILER} --version
OUTPUT_VARIABLE _gcc_version_info
ERROR_VARIABLE _gcc_version_info)
- string(REGEX MATCH "[3-9]\\.[0-9]\\.[0-9]*"
+ string(REGEX MATCH "[1-9][0-9]\\.[0-9]\\.[0-9]*"
_gcc_version "${_gcc_version_info}")
+ if(NOT _gcc_version)
+ string(REGEX MATCH "[3-9]\\.[0-9]\\.[0-9]*"
+ _gcc_version "${_gcc_version_info}")
+ endif()
# gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the
# patch level, handle this here:
if(NOT _gcc_version)
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