This repository is forked from https://github.com/jhnbwrs/macportsGCCfixup
It contains a simple executable that replaces GCC, so that when compiling formore than one architecture:
- it compiles each architecture in separate object files
- it executes
lipoto merge the architectures in a single fat object
This method was implemented by Apple for the GCC 4.2.1 provided in older SDKs, and the source code is available as driverdriver.c. See the original README for details about the full history of this package. The original version used auxiliary shell scripts and did not work with arguments containing spaces. Now, it simply replaces the main GCC and executes the architecture-specific compilers, using the right options.
We just made a few modifications to make it work with more recent GCC, added -m32 when compiling for i386 and friends, and added support for the -fconstant-cfstrings option.
The default installation method (see below) works on MacPorts, and replaces the main gcc/g++ binaries, so make install should be re-run each time GCC is upgraded.
It could be adapted to homebrew, or any custom-built GCC, but MacPorts globally has a much better support for building universal binaries.
If required, older Mac OS X SDKs can be installed using xcodelegacy
sudo port install gcc48 +universal gcc49 +universal gcc5 +universal gcc6 +universal
mkdir build-gcc48
cd build-gcc48
cmake .. -DGCC_VERSION=4.8.5 -DIBERTY_LIB=/opt/local/lib/gcc48/libiberty.a
make
sudo make install
cd ..
mkdir build-gcc49
cd build-gcc49
cmake .. -DGCC_VERSION=4.9.4 -DIBERTY_LIB=/opt/local/lib/gcc48/libiberty.a
make
sudo make install
cd ..
mkdir build-gcc5
cd build-gcc5
cmake .. -DGCC_VERSION=5.4.0 -DIBERTY_LIB=/opt/local/lib/gcc48/libiberty.a
make
sudo make install
cd ..
mkdir build-gcc6
cd build-gcc6
cmake .. -DGCC_VERSION=6.4.0 -DIBERTY_LIB=/opt/local/lib/gcc48/libiberty.a
make
sudo make install
cd ..
mkdir build-gcc7
cd build-gcc7
cmake .. -DGCC_VERSION=7.2.0 -DIBERTY_LIB=/opt/local/lib/gcc48/libiberty.a
make
cd ..