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CMake: Create liblzma.def when building liblzma.dll with MinGW-w64.

This commit is contained in:
Lasse Collin 2023-09-27 22:46:20 +03:00
parent 08d12595f4
commit 80e0750e39
2 changed files with 46 additions and 0 deletions

View file

@ -889,6 +889,26 @@ if(WIN32)
# Export the public API symbols with __declspec(dllexport). # Export the public API symbols with __declspec(dllexport).
target_compile_definitions(liblzma PRIVATE DLL_EXPORT) target_compile_definitions(liblzma PRIVATE DLL_EXPORT)
if(NOT MSVC)
# Create a DEF file. The linker puts the ordinal numbers there
# too so the output from the linker isn't our final file.
target_link_options(liblzma PRIVATE
"-Wl,--output-def,liblzma.def.in")
# Remove the ordinal numbers from the DEF file so that
# no one will create an import library that links by ordinal
# instead of by name. We don't maintain a DEF file so the
# ordinal numbers aren't stable.
add_custom_command(TARGET liblzma POST_BUILD
COMMAND "${CMAKE_COMMAND}"
-DINPUT_FILE=liblzma.def.in
-DOUTPUT_FILE=liblzma.def
-P
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/remove-ordinals.cmake"
BYPRODUCTS "liblzma.def"
VERBATIM)
endif()
else() else()
# Disable __declspec(dllimport) when linking against static liblzma. # Disable __declspec(dllimport) when linking against static liblzma.
target_compile_definitions(liblzma INTERFACE LZMA_API_STATIC) target_compile_definitions(liblzma INTERFACE LZMA_API_STATIC)

View file

@ -0,0 +1,26 @@
#############################################################################
#
# remove-ordinals.cmake
#
# Removes the ordinal numbers from a DEF file that has been created by
# GNU ld or LLVM lld option --output-def (when creating a Windows DLL).
# This should be equivalent: sed 's/ \+@ *[0-9]\+//'
#
# Usage:
#
# cmake -DINPUT_FILE=infile.def.in \
# -DOUTPUT_FILE=outfile.def \
# -P remove-ordinals.cmake
#
#############################################################################
#
# Author: Lasse Collin
#
# This file has been put into the public domain.
# You can do whatever you want with this file.
#
#############################################################################
file(READ "${INPUT_FILE}" STR)
string(REGEX REPLACE " +@ *[0-9]+" "" STR "${STR}")
file(WRITE "${OUTPUT_FILE}" "${STR}")