Hi,
I'm stuck on building GEGL on a 64 bit Debian Wheezy system.
The autogen.sh and make step are ok, but make check shows some tests
with flaws or failing:
run-edge-laplace-broken.xml.sh: little differences, but tolerated
run-pixelize.xml.sh: little differences, but tolerated
run-gamma.xml.sh: failing
Below you find the result of autogen and the failing part of make check.
As I found out the reason is the glibc function 'powf' being inaccurate
on 64-bit systems, see also the GEGL bugreport [1] and the links there.
I'd like to get the failing test passing and already tried the following
without success:
- calling pow and casting to gfloat:
#define powf(a,b) ((gfloat)pow(a,b))
- calling the GCC builtin powf function in gamma.c, if compiled on GCC:
#ifdef __GNUC__
#define powf(a,b) __builtin_powf(a,b)
#endif
- forcing the compiler to use another (hopefully working) math lib:
export LIBS="-lm"
- forcing the compiler not to use a C99 compliant powf function:
deactivate 'export CFLAGS="-std=gnu99"'
- using a binary, older glibc (libc6_2.7-18lenny7_amd64.deb):
even simple shell commands refuse to work now because of missing GLIBC
symbols
- building an older glibc from scratch (glibc-2.11.3) and installing it
to GEGLs $INSTALL_PREFIX: the glibc build fails for unmatching binutils
and installing binutils-gold doesn't help.
Now I'm stuck and need your help. If somebody could give me the right
clue (preferably this week, if possible) would be very fine.
Thanks in advance and kind regards,
Sven
[1] https://bugzilla.gnome.org/show_bug.cgi?id=666417
***************************
Result of autogen:
------------------
Optional features:
GEGL docs: yes
Build workshop: no
Build website: yes
SIMD: sse:yes mmx:yes
Vala support: yes
Optional dependencies:
asciidoc: yes
enscript: yes
Ruby: yes
Lua: yes
Cairo: yes
Pango: yes
pangocairo: yes
GDKPixbuf: yes
JPEG: yes
PNG: yes
OpenEXR: yes
rsvg: yes
SDL: yes
openraw: yes
Jasper: yes
graphviz: yes
avformat: yes
V4L: no
spiro: yes
EXIV: yes
umfpack: yes
Failing part of make check:
---------------------------
make[4]: Entering directory
`/var/lib/jenkins/workspace/gegl-distcheck-master/tests/compositions'
[...]
/var/lib/jenkins/workspace/gegl-distcheck-master/tests/compositions/reference/gamma.png
and
/var/lib/jenkins/workspace/gegl-distcheck-master/tests/compositions/output/gamma.png
differ
wrong pixels : 18160/31680 (57.32%)
max Δe : 30.400
avg Δe (wrong) : 1.439(wrong) 0.825(total)
FAIL: run-gamma.xml.sh
[...]
make[4]: *** [check-TESTS] Error 1
make[4]: Leaving directory
`/var/lib/jenkins/workspace/gegl-distcheck-master/tests/compositions'
make[3]: *** [check-am] Error 2
make[3]: Leaving directory
`/var/lib/jenkins/workspace/gegl-distcheck-master/tests/compositions'
make[2]: *** [check-recursive] Error 1
make[2]: Leaving directory
`/var/lib/jenkins/workspace/gegl-distcheck-master/tests/compositions'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory
`/var/lib/jenkins/workspace/gegl-distcheck-master/tests'
make: *** [check-recursive] Error 1
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