v/thirdparty/libgc/amalgamation.txt

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The libgc source is distributed here as an amalgamation (https://sqlite.org/amalgamation.html).
This means that, rather than mirroring the entire bdwgc repo here, the amalgamate tool
was used to bundle all C files and local includes together into a single C file, which is
much easier to handle. This helps keep the V source distribution small, can reduce compile
times by 3%-15%, and can help C compilers generate more optimized code.
For generating the libgc amalgamation, the following commands were used:
git clone https://github.com/ivmai/bdwgc.git
cd bdwgc
./autogen.sh
./configure --enable-threads=pthreads \
--enable-static \
--enable-shared=no \
--enable-thread-local-alloc=no \
--enable-parallel-mark \
--enable-single-obj-compilation \
--enable-gc-debug
../../../cmd/tools/amalgamate -o ../gc.c \
-b atomic_ops.h \
-b gc/gc.h \
-b gc/gc_backptr.h \
-b gc/gc_disclaim.h \
-b gc/gc_gcj.h \
-b gc/gc_inline.h \
-b gc/gc_mark.h \
-b gc/gc_pthread_redirects.h \
-b gc/gc_tiny_fl.h \
-b gc/gc_typed.h \
-b gc/javaxfc.h \
-b il/PCR_IL.h \
-b mm/PCR_MM.h \
-b psp2-support.h \
-b stubinfo.h \
-b th/PCR_ThCtl.h \
-b vd/PCR_VD.h \
-s include \
-s include/private \
extra/gc.c
The updated header files are then copied into the include/gc directory. We can delete
include/gc/gc_cpp.h since this header is not needed by V. And, we can remove the git
repo for bdwgc.
cp include/gc/*.h ../include/gc
cd ..
rm include/gc/gc_cpp.h
rm -rf bdwgc