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| author | Nikhil Benesch <nikhil.benesch@gmail.com> | 2020-10-26 18:42:08 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2020-10-28 18:20:50 -0700 |
| commit | 0cdde1e7ae197366e17e5ef50bf68d4d5760df01 (patch) | |
| tree | 35bfb1e6e1551c39558abb3b699b032e952823c4 /libgo/configure.ac | |
| parent | e93aae4a497c38b46df818a629c78149fe6af24b (diff) | |
| download | gcc-0cdde1e7ae197366e17e5ef50bf68d4d5760df01.zip gcc-0cdde1e7ae197366e17e5ef50bf68d4d5760df01.tar.gz gcc-0cdde1e7ae197366e17e5ef50bf68d4d5760df01.tar.bz2 | |
libgo: handle linking to NetBSD's versioned symbols
On NetBSD, for backwards compatibility, various libc symbols are
renamed to a symbol with a version suffix. For example, this is the
(abbreviated) definition of sigaction:
int sigaction(...) __asm__ ("__sigaction14")
This poses a challenge for libgo, which attempts to link sigaction by
way of an "//extern" comment:
//extern sigaction
func sigaction(...)
This results in a reference to the deprecated compatibility symbol
"sigaction", rather than the desired "__sigaction14" symbol.
This patch introduces a new "//extern-sysinfo" comment to handle this
situation. The new mklinknames.awk script scans a package for these
comments and outputs a "//go:linkname" directive that links the wrapper
to the correct versioned symbol, as determined by parsing the __asm__
annotation on the function's declaration in gen-sysinfo.go.
For now, only the following packages are scanned by mklinknames.awk:
os
os/user
runtime
syscall
gotools/:
* Makefile.am (check-runtime): Add runtime_linknames.go to
--extrafiles.
* Makefile.in: Regenerate.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/265125
Diffstat (limited to 'libgo/configure.ac')
| -rw-r--r-- | libgo/configure.ac | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libgo/configure.ac b/libgo/configure.ac index f87ab65..80537f5 100644 --- a/libgo/configure.ac +++ b/libgo/configure.ac @@ -580,7 +580,7 @@ AC_C_BIGENDIAN GCC_CHECK_UNWIND_GETIPINFO -AC_CHECK_HEADERS(port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/sysctl.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/bpf.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/ptrace.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h) +AC_CHECK_HEADERS(port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/sysctl.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/bpf.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/ptrace.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h lwp.h) AC_CHECK_HEADERS([netinet/icmp6.h], [], [], [#include <netinet/in.h> |