https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67716
Bug ID: 67716
Summary: [5] [SH]: Miscompiles libraw: Assembler: unaligned
opcodes detected in executable segment
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at physik dot fu-berlin.de
CC: kkojima at gcc dot gnu.org, olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
Hi!
I have recently triggered rebuilds of all packages with reverse-dependencies on
the new standard C++ library which means all of them were recompiled with gcc-5
after (mostly) being previously built with gcc-4.9.
This resulted in a few FTBFS which previously did not occur, mostly because the
packages need to be ported to the new standard C++ library. However, this
particular package, libraw, seems to fail to build due to a regression, as
gcc-5 generates incorrect assembler code for SH:
libtool: compile: g++ -DPACKAGE_NAME=\"LibRaw\" -DPACKAGE_TARNAME=\"libraw\"
-DPACKAGE_VERSION=\"0.16.2\" "-DPACKAGE_STRING=\"LibRaw 0.16.2\""
-DPACKAGE_BUGREPORT=\"i...@libraw.org\" -DPACKAGE_URL=\"http://www.libraw.org\";
-DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1
-DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
-DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\"
-DHAVE_JPEGLIB_H=1 -DHAVE_JPEGLIB_H=1 -DHAVE_JASPER_JASPER_H=1 -I.
-D_FORTIFY_SOURCE=2 -I/usr/local/include -DUSE_JPEG -DUSE_JPEG8 -DUSE_JASPER
-DUSE_LCMS2 -g -O2 -fstack-protector-strong -Wformat -Werror=format-security
-fopenmp -c internal/dcraw_common.cpp -fPIC -DPIC -o
internal/.libs/dcraw_common.o
/tmp/ccTfltZR.s: Assembler messages:
/tmp/ccTfltZR.s: Error: unaligned opcodes detected in executable segment
make[1]: *** [internal/dcraw_common.lo] Error 1
I have taken the build directory as is and created a compressed tar ball from
it which can be downloaded here:
https://people.debian.org/~glaubitz/libraw-qDq4D3.tgz
It's just 2.3 MiB in size.
Full build log in [1].
Adrian
> [1]
> https://buildd.debian.org/status/fetch.php?pkg=libraw&arch=sh4&ver=0.16.2-1%2Bb1&stamp=1443116335
