Personal patches
a86c2dfa1a
Approved by: portmgr (miwi)
GCC has two runtime libraries: The static library libgcc.a (-lgcc) and
the shared library libgcc_s.so (-lgcc_s). Both implement many of the
same functions but they also each have their unique functions. When
GCC links programs and libraries there are three possibilities:
1. gcc -static-libgcc or gcc -static: -lgcc
=> Just use libgcc.a.
2. gcc -shared-libgcc: -lgcc_s -lgcc
=> Link with libgcc_s first, so libgcc.a is only used for its unique
functions.
3. gcc: -lgcc -Wl,--as-needed -lgcc_s -Wl,--no-as-needed
=> Link with libgcc.a first so libgcc_s is only used for its unique
functions (_Unwind_* functions).
Approach 3 is the default for gcc and it's also what clang and clang++ use;
approach 2 is the default for gfortran, g++ and probably other front ends.
This patch makes 3 the default for gfortran. It significantly reduces
the use of libgcc_s. The _Unwind_* functions are also available in the
old base system libgcc_s which means this reduces the need for
-rpath /usr/local/lib/gccN in ports that depend on libraries built with
gfortran. Consider a dependency tree like this:
prog -> libA -> libgcc_s (old base system libgcc_s is fine)
-> libB -> libgcc_s (libB built with gfortran, needs new libgcc_s)
Here prog needs to be linked with -rpath /usr/local/lib/gccN even if it's
a normal C program compiled with clang. Without -rpath it will fail to
start because it loads old libgcc_s first as a dependency of libA and then
it fails to load libB. With this patch libB works with old base system
libgcc_s or may not need libgcc_s at all, so prog does not need to be
linked with -rpath.
PR: 208120
Submitted by: tijl
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| accessibility | ||
| arabic | ||
| archivers | ||
| astro | ||
| audio | ||
| base | ||
| benchmarks | ||
| biology | ||
| cad | ||
| chinese | ||
| comms | ||
| converters | ||
| databases | ||
| deskutils | ||
| devel | ||
| dns | ||
| editors | ||
| emulators | ||
| finance | ||
| french | ||
| ftp | ||
| games | ||
| german | ||
| graphics | ||
| hebrew | ||
| hungarian | ||
| irc | ||
| japanese | ||
| java | ||
| Keywords | ||
| korean | ||
| lang | ||
| math | ||
| misc | ||
| Mk | ||
| multimedia | ||
| net | ||
| net-im | ||
| net-mgmt | ||
| net-p2p | ||
| news | ||
| palm | ||
| polish | ||
| ports-mgmt | ||
| portuguese | ||
| russian | ||
| science | ||
| security | ||
| shells | ||
| sysutils | ||
| Templates | ||
| textproc | ||
| Tools | ||
| ukrainian | ||
| vietnamese | ||
| www | ||
| x11 | ||
| x11-clocks | ||
| x11-drivers | ||
| x11-fm | ||
| x11-fonts | ||
| x11-servers | ||
| x11-themes | ||
| x11-toolkits | ||
| x11-wm | ||
| .arcconfig | ||
| .gitattributes | ||
| .gitauthors | ||
| .gitignore | ||
| .gitmessage | ||
| CHANGES | ||
| CONTRIBUTING.md | ||
| COPYRIGHT | ||
| GIDs | ||
| LEGAL | ||
| Makefile | ||
| MOVED | ||
| README | ||
| UIDs | ||
| UPDATING | ||
This is the FreeBSD Ports Collection. For an easy to use WEB-based interface to it, please see: https://www.FreeBSD.org/ports For general information on the Ports Collection, please see the FreeBSD Handbook ports section which is available from: https://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/ports.html for the latest official version or: The ports(7) manual page (man ports). These will explain how to use ports and packages. If you would like to search for a port, you can do so easily by saying (in /usr/ports): make search name="<name>" or: make search key="<keyword>" which will generate a list of all ports matching <name> or <keyword>. make search also supports wildcards, such as: make search name="gtk*" For information about contributing to FreeBSD ports, please see the Porter's Handbook, available at: https://www.FreeBSD.org/doc/en_US.ISO8859-1/books/porters-handbook/ NOTE: This tree will GROW significantly in size during normal usage! The distribution tar files can and do accumulate in /usr/ports/distfiles, and the individual ports will also use up lots of space in their work subdirectories unless you remember to "make clean" after you're done building a given port. /usr/ports/distfiles can also be periodically cleaned without ill-effect.