Build issue, FFI & CTYPES, musl libc, FDE_ENCODE() #215

johnmudd · 2018-03-20T20:06:09Z

Got the following trying to build 2.7.14 on Linux Mint 18 using musl libc.

[ 91%] Building ASM object CMakeBuild/libpython/CMakeFiles/libpython-static.dir/home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S.o
/home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S: Assembler messages:
/home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S:403: Error: junk at end of line, first unrecognized character is @' /home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S:424: Error: junk at end of line, first unrecognized character is @'
/home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S:454: Error: junk at end of line, first unrecognized character is `@'
CMakeBuild/libpython/CMakeFiles/libpython-static.dir/build.make:4190: recipe for target 'CMakeBuild/libpython/CMakeFiles/libpython-static.dir/home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S.o' failed
make[2]: *** [CMakeBuild/libpython/CMakeFiles/libpython-static.dir/home/mudd/musl-static/Python-2.7.14/Modules/_ctypes/libffi/src/x86/sysv.S.o] Error 1
CMakeFiles/Makefile2:1311: recipe for target 'CMakeBuild/libpython/CMakeFiles/libpython-static.dir/all' failed
make[1]: *** [CMakeBuild/libpython/CMakeFiles/libpython-static.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

Here are the lines that have issues.
403: .long FDE_ENCODE(.LFB1) /* FDE initial location /
424: .long FDE_ENCODE(.LFB2) / FDE initial location /
454: .long FDE_ENCODE(.LFB3) / FDE initial location */

Here are all the lines with FDE_ENCODE(). It look like all are commented out?

#if defined __GNUC__
/* Only emit dwarf unwind info when building with GNU toolchain.  */

#if defined __PIC__
# if defined __sun__ && defined __svr4__
/* 32-bit Solaris 2/x86 uses datarel encoding for PIC.  GNU ld before 2.22
   doesn't correctly sort .eh_frame_hdr with mixed encodings, so match this.  */
#  define FDE_ENCODING      0x30    /* datarel */
#  define FDE_ENCODE(X)     X@GOTOFF
# else
#  define FDE_ENCODING      0x1b    /* pcrel sdata4 */
#  if defined HAVE_AS_X86_PCREL
#   define FDE_ENCODE(X)    X-.
#  else
#   define FDE_ENCODE(X)    X@rel
#  endif
# endif
#else
# define FDE_ENCODING       0   /* absolute */
# define FDE_ENCODE(X)      X
#endif

johnmudd · 2018-03-20T20:09:46Z

Oh, I guess this is the problem.

#if defined __GNUC__
/* Only emit dwarf unwind info when building with GNU toolchain.  */

I need to get __GNUC__ set.

jcfr · 2018-03-20T20:26:02Z

Thanks for the report.

look like all are commented out
#  define FDE_ENCODE(X)         X@GOTOFF
[...]

In fact, these are pre-processor macros

Linux Mint 18 using musl libc.

To setup continuous integration using that system, it may be sensible to add a dockbuild image to https://github.com/dockbuild/dockbuild#readme similarly to what is being done for ubuntu dockbuild/dockbuild#17

johnmudd · 2018-03-21T15:00:00Z

It sounds like I need to recreate the issue inside a Docker "VM"? But even after looking at the links I don't know where to begin.

But that might have to wait. As a temporary work around I edited the sysv.S file, removed the __GNUC__ #ifdef and the make works. But now I'm unable to run the static python on other machines by just copying the python executable. I get "ImportError: No module named site".

I started over and used -DENABLE_CTYPES:BOOL=0 as a work around and still get error when try to run the single python file on other machines. This is strange because this much worked before.

python-cmake-buildsystem / python-cmake-buildsystem

Build issue, FFI & CTYPES, musl libc, FDE_ENCODE() #215

Build issue, FFI & CTYPES, musl libc, FDE_ENCODE() #215

johnmudd commented Mar 20, 2018 •

edited

johnmudd commented Mar 20, 2018 •

edited by jcfr

jcfr commented Mar 20, 2018 •

edited

johnmudd commented Mar 21, 2018

python-cmake-buildsystem / python-cmake-buildsystem

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Build issue, FFI & CTYPES, musl libc, FDE_ENCODE() #215

Build issue, FFI & CTYPES, musl libc, FDE_ENCODE() #215

Comments

johnmudd commented Mar 20, 2018 • edited

johnmudd commented Mar 20, 2018 • edited by jcfr

jcfr commented Mar 20, 2018 • edited

johnmudd commented Mar 21, 2018

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johnmudd commented Mar 20, 2018 •

edited

johnmudd commented Mar 20, 2018 •

edited by jcfr

jcfr commented Mar 20, 2018 •

edited