diff options
Diffstat (limited to '')
| -rw-r--r-- | CMakeLists.txt | 54 |
1 files changed, 47 insertions, 7 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index c5e19a9a..c265cac4 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -10,7 +10,6 @@ # On some platforms this builds also xz and xzdec, but these are # highly experimental and meant for testing only: # - No large file support on those 32-bit platforms that need it -# - No replacement getopt_long(), libc must have it # - No sandboxing support # - No translations # @@ -984,18 +983,59 @@ install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblzma-config.cmake" ############################################################################# -# getopt_long +# libgnu (getopt_long) ############################################################################# -# The command line tools needs this. +# This mirrors how the Autotools build system handles the getopt_long +# replacement, calling the object library libgnu since the replacement +# version comes from Gnulib. +add_library(libgnu OBJECT) + +# CMake requires that even an object library must have at least once source +# file. So we give it a header file that results in no output files. +target_sources(libgnu PRIVATE lib/getopt.in.h) + +# Create /lib directory in the build directory and add it to the include path. +file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib") +target_include_directories(libgnu PUBLIC "${CMAKE_CURRENT_BINARY_DIR}/lib") + +# The command line tools need getopt_long in order to parse arguments. If +# the system does not have a getopt_long implementation we can use the one +# from Gnulib instead. check_symbol_exists(getopt_long getopt.h HAVE_GETOPT_LONG) +if(NOT HAVE_GETOPT_LONG) + # Set the __GETOPT_PREFIX definition to "rpl_" (replacement) to avoid + # name conflicts with libc symbols. The same prefix is set if using + # the Autotools build (m4/getopt.m4). + target_compile_definitions(libgnu PUBLIC "__GETOPT_PREFIX=rpl_") + + # Create a custom copy command to copy the getopt header to the build + # directory and re-copy it if it is updated. (Gnulib does it this way + # because it allows choosing which .in.h files to actually use in the + # build. We need just getopt.h so this is a bit overcomplicated for + # a single header file only.) + add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" + COMMAND "${CMAKE_COMMAND}" -E copy + "${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h" + "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" + MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h" + VERBATIM) + + target_sources(libgnu PRIVATE + lib/getopt1.c + lib/getopt.c + lib/getopt_int.h + "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" + ) +endif() + ############################################################################# # xzdec ############################################################################# -if(HAVE_GETOPT_LONG AND HAVE_DECODERS) +if(HAVE_DECODERS) add_executable(xzdec src/common/sysdefs.h src/common/tuklib_common.h @@ -1013,7 +1053,7 @@ if(HAVE_GETOPT_LONG AND HAVE_DECODERS) src/liblzma/api ) - target_link_libraries(xzdec PRIVATE liblzma) + target_link_libraries(xzdec PRIVATE liblzma libgnu) if(WIN32) # Add the Windows resource file for xzdec.exe. @@ -1041,7 +1081,7 @@ endif() # xz ############################################################################# -if(NOT MSVC AND HAVE_GETOPT_LONG) +if(NOT MSVC) add_executable(xz src/common/mythread.h src/common/sysdefs.h @@ -1095,7 +1135,7 @@ if(NOT MSVC AND HAVE_GETOPT_LONG) ) endif() - target_link_libraries(xz PRIVATE liblzma) + target_link_libraries(xz PRIVATE liblzma libgnu) target_compile_definitions(xz PRIVATE ASSUME_RAM=128) |