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build/python/cmake: set CMAKE_OSX_SYSROOT on macOS

This commit is contained in:
Max Kellermann 2022-08-08 10:51:23 +02:00
parent f8cfeb39e9
commit d105985d78
1 changed files with 21 additions and 0 deletions
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21
python/build/cmake.py
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@ -1,4 +1,5 @@
import os import os
import re
import subprocess import subprocess
from build.project import Project from build.project import Project
@ -31,6 +32,26 @@ set(CMAKE_CXX_FLAGS "{toolchain.cxxflags} {toolchain.cppflags}")
__write_cmake_compiler(f, 'C', toolchain.cc) __write_cmake_compiler(f, 'C', toolchain.cc)
__write_cmake_compiler(f, 'CXX', toolchain.cxx) __write_cmake_compiler(f, 'CXX', toolchain.cxx)
if cmake_system_name == 'Darwin':
# On macOS, cmake forcibly adds an "-isysroot" flag even if
# one is already present in the flags variable; this breaks
# cross-compiling for iOS, and can be worked around by setting
# the CMAKE_OSX_SYSROOT variable
# (https://cmake.org/cmake/help/latest/variable/CMAKE_OSX_SYSROOT.html).
m = re.search(r'-isysroot +(\S+)', toolchain.cflags)
if m:
sysroot = m.group(1)
print(f'set(CMAKE_OSX_SYSROOT {sysroot})', file=f)
# search libraries and headers only in the sysroot, not on
# the build host
f.write(f"""
set(CMAKE_FIND_ROOT_PATH "{toolchain.install_prefix};{sysroot}")
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
""")
def configure(toolchain, src, build, args=(), env=None): def configure(toolchain, src, build, args=(), env=None):
cross_args = [] cross_args = []