Merge pull request #846 from GuillaumeGomez/compile-only #1537

Job	Run time
build (libgccjit.so, master)	8m 39s
build (libgccjit_without_int128.so, master-without-128bit-integers)	9m 13s
build (libgccjit12.so, gcc12, --no-default-features, TEST_FLAGS='-Cpanic=abort -Zpanic-abort-test...	9m 55s
success_failures	3s
	27m 50s

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