Description of problem:

For Ghostscript to be rebased to 9.27, it needs jbig2dec-0.16.

Mentioned also on release pages for 9.27:

https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/gs927


Actual results:

~~~
make[2]: Entering directory '/home/mosvald/Work/redhat/src/ghostscript/fedora/ghostscript/f29/ghostscript-9.27'
gcc  -DHAVE_MKSTEMP -DHAVE_FILE64 -DHAVE_FSEEKO -DHAVE_MKSTEMP64 -DHAVE_FONTCONFIG -DHAVE_LIBIDN -DHAVE_SETLOCALE -DHAVE_SSE2 -DHAVE_DBUS -DHAVE_BSWAP32 -DHAVE_BYTESWAP_H -DHAVE_STRERROR -DHAVE_ISNAN -DHAVE_ISINF  -DHAVE_PREAD_PWRITE=1 -DGS_RECURSIVE_MUTEXATTR=PTHREAD_MUTEX_RECURSIVE -fPIC  -O2 -fPIC \
         -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -DHAVE_STDINT_H=1 -DHAVE_DIRENT_H=1 -DHAVE_SYS_DIR_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TIMES_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_LIBDL=1 -DGX_COLOR_INDEX_TYPE="unsigned long long" -D__USE_UNIX98=1  -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -DHAVE_RESTRICT=1 -DUSE_LIBPAPER  -fno-strict-aliasing -DHAVE_POPEN_PROTO=1 -DGS_DEVS_SHARED -DGS_DEVS_SHARED_DIR=\"/usr/lib64/ghostscript\"  -I./soobj -I./base -I./devices -Isrc   -o ./soobj/sjbig2.o -c ./base/sjbig2.c
./base/sjbig2.c: In function 's_jbig2decode_make_global_data':
./base/sjbig2.c:228:35: warning: passing argument 4 of 'jbig2_ctx_new' from incompatible pointer type [-Wincompatible-pointer-types]
                             NULL, s_jbig2decode_error, NULL);
                                   ^~~~~~~~~~~~~~~~~~~
In file included from ./base/sjbig2.h:25,
                 from ./base/sjbig2.c:26:
/usr/include/jbig2.h:93:11: note: expected 'Jbig2ErrorCallback' {aka 'int (*)(void *, const char *, enum <anonymous>,  int)'} but argument is of type 'void (*)(void *, const char *, Jbig2Severity,  int32_t)' {aka 'void (*)(void *, const char *, enum <anonymous>,  int)'}
 Jbig2Ctx *jbig2_ctx_new(Jbig2Allocator *allocator,
           ^~~~~~~~~~~~~
./base/sjbig2.c:238:21: error: invalid use of void expression
         allocator = (s_jbig2decode_allocator_t *) jbig2_ctx_free(ctx);
                     ^
./base/sjbig2.c: In function 's_jbig2decode_free_global_data':
./base/sjbig2.c:257:17: error: invalid use of void expression
     allocator = (s_jbig2decode_allocator_t *) jbig2_global_ctx_free(global_ctx);
                 ^
./base/sjbig2.c: In function 's_jbig2decode_init':
./base/sjbig2.c:306:42: warning: passing argument 4 of 'jbig2_ctx_new' from incompatible pointer type [-Wincompatible-pointer-types]
                              global_ctx, s_jbig2decode_error, state->callback_data);
                                          ^~~~~~~~~~~~~~~~~~~
In file included from ./base/sjbig2.h:25,
                 from ./base/sjbig2.c:26:
/usr/include/jbig2.h:93:11: note: expected 'Jbig2ErrorCallback' {aka 'int (*)(void *, const char *, enum <anonymous>,  int)'} but argument is of type 'void (*)(void *, const char *, Jbig2Severity,  int32_t)' {aka 'void (*)(void *, const char *, enum <anonymous>,  int)'}
 Jbig2Ctx *jbig2_ctx_new(Jbig2Allocator *allocator,
           ^~~~~~~~~~~~~
./base/sjbig2.c: In function 's_jbig2decode_release':
./base/sjbig2.c:391:21: error: invalid use of void expression
         allocator = (s_jbig2decode_allocator_t *) jbig2_ctx_free(state->decode_ctx);
                     ^
make[2]: *** [base/lib.mak:1780: soobj/sjbig2.o] Error 1
make[2]: Leaving directory '/home/mosvald/Work/redhat/src/ghostscript/fedora/ghostscript/f29/ghostscript-9.27'
make[2]: *** Waiting for unfinished jobs....
make[2]: Entering directory '/home/mosvald/Work/redhat/src/ghostscript/fedora/ghostscript/f29/ghostscript-9.27'
~~~


Expected results:

Ghostscript 9.27 gets compiled cleanly with jbig2dec-devel-0.16-1.fc29:

~~~
make[2]: Entering directory '/home/mosvald/Work/redhat/src/ghostscript/fedora/ghostscript/f29/ghostscript-9.27'
gcc  -DHAVE_MKSTEMP -DHAVE_FILE64 -DHAVE_FSEEKO -DHAVE_MKSTEMP64 -DHAVE_FONTCONFIG -DHAVE_LIBIDN -DHAVE_SETLOCALE -DHAVE_SSE2 -DHAVE_DBUS -DHAVE_BSWAP32 -DHAVE_BYTESWAP_H -DHAVE_STRERROR -DHAVE_ISNAN -DHAVE_ISIN
F  -DHAVE_PREAD_PWRITE=1 -DGS_RECURSIVE_MUTEXATTR=PTHREAD_MUTEX_RECURSIVE -fPIC  -O2 -fPIC \
         -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -DHAVE_STDINT_H=1 -DHAVE_DIRENT_H=1 -DHAVE_SYS_DIR_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TIMES_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_LIBDL=1 -DGX_COLOR_INDEX_TYPE="unsigned long long" -D__USE_UNIX98=1  -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -DHAVE_RESTRICT=1 -DUSE_LIBPAPER  -fno-strict-aliasing -DHAVE_POPEN_PROTO=1 -DGS_DEVS_SHARED -DGS_DEVS_SHARED_DIR=\"/usr/lib64/ghostscript\"  -I./soobj -I./base -I./devices -Isrc   -o ./soobj/sjbig2.o -c ./base/sjbig2.c
make[2]: Leaving directory '/home/mosvald/Work/redhat/src/ghostscript/fedora/ghostscript/f29/ghostscript-9.27'
~~~