| Subject: | CCFLAGS and "not a CODE |
| Date: | Sun, 04 Dec 2011 07:12:34 +1100 |
| To: | bug-Image-PNGwriter [...] rt.cpan.org |
| From: | Kevin Ryde <user42 [...] zip.com.au> |
With recent debian i386 perl 5.14.2 "make test" gets an error
# Failed test 'use Image::PNGwriter;'
# at t/Image-PNGwriter.t line 9.
# Tried to use 'Image::PNGwriter'.
# Error: Not a CODE reference at /usr/lib/perl/5.14/DynaLoader.pm line 207.
# END failed--call queue aborted at /tmp/Image-PNGwriter-0.01/blib/lib/Image/PNGwriter.pm line 207.
# Compilation failed in require at (eval 4) line 2.
# BEGIN failed--compilation aborted at (eval 4) line 2.
# Looks like you failed 1 test of 2.
t/Image-PNGwriter.t .. Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/2 subtests
I believe the way Makefile.PL overrides CCFLAGS loses flags which are
necessary for binary compatibility on perl structs etc. It's probably
-D_FILE_OFFSET_BITS=64 needed, but I didn't try to see what affects it.
PNGwriter.o built with or without the CCFLAGS override come out
different in certain offsets, in particular PL_unitcheckav hits
somewhere wrong and the call_list() of that array generated by the
xsubpp goes bad resulting in "Not a CODE reference".
INC is a good place to add flags like $freetype_cflags (which is after
all just a -I include), per first diff below. Otherwise the
ExtUtils::MakeMaker docs advise that $Config{ccflags} should be kept in
CCFLAGS for this binary compatibility, per second diff below.
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