- GSEXE was not set during build, causing
fig2dev -L pdf part.fig part.pdf
to fail like this:
sh: -q: not found
Error in ghostcript command
command was: -q -sAutoRotatePages=None -dAutoFilterColorImages=false -dColorImageFilter=/DCTEncode -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -o 'part.pdf' -
Reported by: Anton Shterenlikht <mexas@bristol.ac.uk>
MFH: 2018q3
Port changes:
* Project moved to github
* Add LICENSE_FILE
* Add USE_LDCONFIG: it now installs the shared library
* Remove do-install: it now installs by itself
Reported by: repology
https://gcc.gnu.org/gcc-8/changes.html has a comprehensive overview of
many changes in this release and https://gcc.gnu.org/gcc-8/porting_to.html
addresses issues you may encounter porting to this new version.
To provide a brief overview of some of the more noticable changes:
On the optimization front inter-procedural optimizations (IPO) and profile
driven optimizations (PDO) have been further improved and some classic loop
nest optimization passes have been added: -floop-unroll-and-jam performs
outer loop unrolling and fusing of the inner loop copies, while
-floop-interchange exchanges loops in a loop nest to improve data locality.
These, as well as an improved -ftree-loop-distribution pass are enabled by
default at -O3 and above.
A new pragma "GCC unroll" has been implemented in the C family of languages
as well as Fortran to provide finer-grained control over loop unrolling.
DWARF debugging information in the presence of link-time optimization now
properly preserves language-specific information. The -gcolumn-info
option is now enabled by default, so column information is part of DWARF
debugging information in addition to filenames and line numbers.
The C family compilers have gained options -Wmultistatement-macros
(warning about unsafe macros expanding to multiple statements used
as a body of a statement such as if, else, while, switch, or for),
-Wstringop-truncation (warning for calls to bounded string manipulation
functions such as strncat, strncpy, and stpncpy that might either truncate
the copied string or leave the destination unchanged), -Wcast-function-type
(warning when a function pointer is cast to an incompatible function pointer,
enabled by -Wextra), and -Wsizeof-pointer-div (warning for suspicious
divisions of the size of a pointer by the size of the elements it points
to, which usually is an indication of a mistaken way to calculate the
number of elements in an array, enabled by -Wall), among others.
The existing -Warray-bounds and -Wrestrict options have been enhanced to
detect many more instances, as have -Wformat-overflow and -Wformat-truncation.
Error messages and warnings better highlight the locations of issues in
many cases, and helpful "fix it" hints are provided more often.
The C++ ABI (-fabi-version=12) introduces minor changes in a few fringe
cases. The GCC 7 ABI can still be selected with -fabi-version=11.
The C++ frontend as well as libstdc++ feature experimental support for
many C++2a features and Fortran has seen a large number of improvements.
Lots and lots of improvements for Arm and AArch64 targets, as well as
the usual dose on x86 and powerpc.
PR: 229681
