Commit 5f05a3c2 authored by Brad King's avatar Brad King
Browse files

MinGW: Support long object file lists

Use a combination of response files and the archiver to support long
object file lists that do not fit in the Windows command-line length
limit.  This can work only with GCC >= 4 because the MinGW GCC 3.x
front-ends do not support response-file syntax.
parent 2d9bb332
include(Platform/Windows-GNU) include(Platform/Windows-GNU)
__windows_compiler_gnu(Fortran) __windows_compiler_gnu(Fortran)
set(CMAKE_Fortran_USE_RESPONSE_FILE_FOR_OBJECTS 0)
...@@ -76,7 +76,23 @@ macro(__windows_compiler_gnu lang) ...@@ -76,7 +76,23 @@ macro(__windows_compiler_gnu lang)
set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "") # No -fPIC on Windows set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "") # No -fPIC on Windows
set(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS ${__WINDOWS_GNU_LD_RESPONSE}) set(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS ${__WINDOWS_GNU_LD_RESPONSE})
# We prefer "@" for response files but it is not supported by gcc 3.
execute_process(COMMAND ${CMAKE_${lang}_COMPILER} --version OUTPUT_VARIABLE _ver ERROR_VARIABLE _ver)
if("${_ver}" MATCHES "\\(GCC\\) 3\\.")
if("${lang}" STREQUAL "Fortran")
# The GNU Fortran compiler reports an error:
# no input files; unwilling to write output files
# when the response file is passed with "-Wl,@".
set(CMAKE_Fortran_USE_RESPONSE_FILE_FOR_OBJECTS 0)
else()
# Use "-Wl,@" to pass the response file to the linker.
set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "-Wl,@") set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "-Wl,@")
endif()
elseif(CMAKE_${lang}_USE_RESPONSE_FILE_FOR_OBJECTS)
# Use "@" to pass the response file to the front-end.
set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "@")
endif()
# Binary link rules. # Binary link rules.
set(CMAKE_${lang}_CREATE_SHARED_MODULE set(CMAKE_${lang}_CREATE_SHARED_MODULE
...@@ -85,4 +101,21 @@ macro(__windows_compiler_gnu lang) ...@@ -85,4 +101,21 @@ macro(__windows_compiler_gnu lang)
"<CMAKE_${lang}_COMPILER> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> ${CMAKE_GNULD_IMAGE_VERSION} <OBJECTS> <LINK_LIBRARIES>") "<CMAKE_${lang}_COMPILER> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> ${CMAKE_GNULD_IMAGE_VERSION} <OBJECTS> <LINK_LIBRARIES>")
set(CMAKE_${lang}_LINK_EXECUTABLE set(CMAKE_${lang}_LINK_EXECUTABLE
"<CMAKE_${lang}_COMPILER> <FLAGS> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> ${CMAKE_GNULD_IMAGE_VERSION} <LINK_LIBRARIES>") "<CMAKE_${lang}_COMPILER> <FLAGS> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> ${CMAKE_GNULD_IMAGE_VERSION} <LINK_LIBRARIES>")
# Support very long lists of object files.
if("${CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG}" STREQUAL "@")
foreach(rule CREATE_SHARED_MODULE CREATE_SHARED_LIBRARY LINK_EXECUTABLE)
# The gcc/collect2/ld toolchain does not use response files
# internally so we cannot pass long object lists. Instead pass
# the object file list in a response file to the archiver to put
# them in a temporary archive. Hand the archive to the linker.
string(REPLACE "<OBJECTS>" "-Wl,--whole-archive <OBJECT_DIR>/objects.a -Wl,--no-whole-archive"
CMAKE_${lang}_${rule} "${CMAKE_${lang}_${rule}}")
set(CMAKE_${lang}_${rule}
"<CMAKE_COMMAND> -E remove -f <OBJECT_DIR>/objects.a"
"<CMAKE_AR> cr <OBJECT_DIR>/objects.a <OBJECTS>"
"${CMAKE_${lang}_${rule}}"
)
endforeach()
endif()
endmacro() endmacro()
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