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Bug #80717 Calling minilua during cross-compiling
Submitted: 2021-02-06 13:09 UTC Modified: -
From: mhei at heimpold dot de Assigned:
Status: Open Package: Compile Failure
PHP Version: 8.0.2 OS: Linux
Private report: No CVE-ID: None
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 [2021-02-06 13:09 UTC] mhei at heimpold dot de 
Description:
------------
During OpenWrt "cross-compiling" for x86_64, we noticed that during the build a minilua compiler is generated and finally invoked. I refer to the following lines
in ext/opcache/jit/Makefile.frag:

  $(builddir)/minilua: $(srcdir)/jit/dynasm/minilua.c
    $(CC) $(srcdir)/jit/dynasm/minilua.c -lm -o $@

  $(builddir)/jit/zend_jit_x86.c: $(srcdir)/jit/zend_jit_x86.dasc $(srcdir)/jit/dynasm/*.lua $(builddir)/minilua
    $(builddir)/minilua $(srcdir)/jit/dynasm/dynasm.lua  $(DASM_FLAGS) -o $@ $(srcdir)/jit/zend_jit_x86.dasc

While this is fine when doing a native build, it fails for "cross-compiling" e.g. due to different used C libraries (e.g. target=musl, host=glibc). Our solution is to convert the $(CC) to $(HOSTCC) which is then passed via environment. Not sure, whether this is the best solution. Also it might need additional makefile magic for none "cross-compiling" environments.

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