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GCC.rst

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GCC backend

Requirements

  • GCC (Gnu Compiler Collection)
  • GNAT (Ada compiler for GCC)
  • GCC source files. Download and untar the sources of version 4.9.x, 5.x, 6.x, 7.x, 8.x, 9.x, 10.x or 11.x (GCC mirror sites).
  • First configure GHDL, specify GCC source directory and installation prefix (like /usr/local or /opt/ghdl).
  • Next, invoke make copy-sources to copy GHDL sources in the source directory.
  • Then, configure GCC. The list of --disable configure options can be adjusted to your needs. GHDL does not require all these optional libraries and disabling them will speed up the build.
  • Now, build and install GCC with make.
  • Last, build and install GHDL libraries.

Example:

$ cd <ghdl>
$ mkdir build
$ cd build
$ ../configure --with-gcc=/path/to/gcc/source/dir --prefix=/usr/local
$ make copy-sources
$ mkdir gcc-objs; cd gcc-objs
$ /path/to/gcc/source/dir/configure --prefix=/usr/local --enable-languages=c,vhdl \
--disable-bootstrap --disable-lto --disable-multilib --disable-libssp \
--disable-libgomp --disable-libquadmath
$ make -j2 && make install
$ cd /path/to/ghdl/source/dir/build
$ make ghdllib
$ make install