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CMake: Use configure_file() to copy a file 

I had missed this simpler method before. It does create a dependency
so that if .in.h changes the copying is done again.

(cherry picked from commit de215a0517)
This commit is contained in:
Lasse Collin 2024-06-25 16:11:13 +03:00
parent 52a8c87f37
commit 809e69f1f5
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1 changed files with 7 additions and 10 deletions
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17
CMakeLists.txt
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@ -1578,17 +1578,14 @@ if(NOT HAVE_GETOPT_LONG)
# the Autotools build (m4/getopt.m4). # the Autotools build (m4/getopt.m4).
target_compile_definitions(libgnu PUBLIC "__GETOPT_PREFIX=rpl_") target_compile_definitions(libgnu PUBLIC "__GETOPT_PREFIX=rpl_")
# Create a custom copy command to copy the getopt header to the build # Copy the getopt header to the build directory and re-copy it
# directory and re-copy it if it is updated. (Gnulib does it this way # if it is updated. (Gnulib does it this way because it allows
# because it allows choosing which .in.h files to actually use in the # choosing which .in.h files to actually use in the build. We
# build. We need just getopt.h so this is a bit overcomplicated for # need just getopt.h so this is a bit overcomplicated for
# a single header file only.) # a single header file only.)
add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" configure_file("${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h"
COMMAND "${CMAKE_COMMAND}" -E copy "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h"
"${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h" COPYONLY)
"${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h"
MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h"
VERBATIM)
target_sources(libgnu PRIVATE target_sources(libgnu PRIVATE
lib/getopt1.c lib/getopt1.c