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fix boost build b2.exe for non-msvc compilers in win32.

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propagate the selected compiler from cmake down to the boost bootstrap process
This commit is contained in:
Martin Posch
2024-04-30 23:38:49 +02:00
committed by Zach Laine
parent 2a9687f22f
commit d45b964cb1
1 changed files with 27 additions and 3 deletions
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30
cmake/dependencies.cmake
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@@ -25,7 +25,9 @@ add_custom_command(
https://github.com/boostorg/boost.git boost_root
WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
if (MSVC)
# MSVC determines the compiler and not the target platform
# here we need to check WIN32
if (WIN32)
set(b2_exe b2.exe)
else()
set(b2_exe b2)
@@ -39,8 +41,29 @@ add_custom_target(boost_clone_deps
VERBATIM)
add_dependencies(boost_clone_deps boost_clone_superproject)
if (MSVC)
set(bootstrap_cmd ./bootstrap.bat)
if (WIN32)
# Windows:
# in order to build 'b2_exe' with the same toolset as configured in the current cmake run,
# we need to tell the boost bootstrap process and pass some parameters
# - as first parameter msvc, gcc or clang for the compiler type
# - additionally, for non-MSVC we need to set the environment variable CXX to the compiler: ${CMAKE_CXX_COMPILER} which
# is a fully qualified path name, so that the compiler can be found by the bootstrap_cmd
# calling b2.exe should work also for non-MSVC compilers, as during the build, the runtime directory is part of the search PATH
if (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
message(STATUS "configure BOOST for Visual Studio built-in compilers (i.e cl, clang-cl and clang")
set(bootstrap_cmd ./bootstrap.bat msvc)
# here we do not need to distinguish the different compilers as only the frontend is different
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
message(STATUS "configure BOOST for Clang compiler")
set(bootstrap_cmd ./bootstrap.bat clang)
set(COMMAND_ENV set CXX=${CMAKE_CXX_COMPILER})
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
message(STATUS "configure BOOST for GCC compiler")
set(bootstrap_cmd ./bootstrap.bat gcc)
set(COMMAND_ENV set CXX=${CMAKE_CXX_COMPILER})
endif ()
else()
# windres produces relocations that are rejected
# by stricter ld configurations used in some distros
@@ -57,6 +80,7 @@ add_custom_command(
COMMAND git submodule init libs/headers
COMMAND git submodule init tools/boost_install
COMMAND git submodule update --jobs 3 --depth 100
COMMAND ${COMMAND_ENV}
COMMAND ${bootstrap_cmd}
COMMAND ./b2 headers
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/boost_root)