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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 /gotools/Makefile.in | |
| parent | e93aae4a497c38b46df818a629c78149fe6af24b (diff) | |
| download | gcc-0cdde1e7ae197366e17e5ef50bf68d4d5760df01.tar.gz | |
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 'gotools/Makefile.in')
| -rw-r--r-- | gotools/Makefile.in | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gotools/Makefile.in b/gotools/Makefile.in index 930189a55eb..9292312a385 100644 --- a/gotools/Makefile.in +++ b/gotools/Makefile.in @@ -912,14 +912,14 @@ mostlyclean-local: @NATIVE_TRUE@ export LD_LIBRARY_PATH; \ @NATIVE_TRUE@ GOARCH=`$(abs_builddir)/go$(EXEEXT) env GOARCH`; \ @NATIVE_TRUE@ GOOS=`$(abs_builddir)/go$(EXEEXT) env GOOS`; \ -@NATIVE_TRUE@ files=`$(SHELL) $(libgosrcdir)/../match.sh --goarch=$${GOARCH} --goos=$${GOOS} --srcdir=$(libgosrcdir)/runtime --extrafiles="$(libgodir)/runtime_sysinfo.go $(libgodir)/sigtab.go" --tag=libffi`; \ +@NATIVE_TRUE@ files=`$(SHELL) $(libgosrcdir)/../match.sh --goarch=$${GOARCH} --goos=$${GOOS} --srcdir=$(libgosrcdir)/runtime --extrafiles="$(libgodir)/runtime_linknames.go $(libgodir)/runtime_sysinfo.go $(libgodir)/sigtab.go" --tag=libffi`; \ @NATIVE_TRUE@ echo "$(ECHO_ENV) GC='$(abs_builddir)/check-gccgo -fgo-compiling-runtime' GOARCH=$${GOARCH} GOOS=$${GOOS} $(SHELL) $(libgosrcdir)/../testsuite/gotest --goarch=$${GOARCH} --goos=$${GOOS} --basedir=$(libgosrcdir)/.. --srcdir=$(libgosrcdir)/runtime --pkgpath=runtime --pkgfiles='$${files}' $(GOTESTFLAGS) -test.timeout=$(GOTOOLS_TEST_TIMEOUT)s -test.v" > runtime-testlog @NATIVE_TRUE@ $(CHECK_ENV) \ @NATIVE_TRUE@ GC="$${GCCGO} -fgo-compiling-runtime"; \ @NATIVE_TRUE@ export GC; \ @NATIVE_TRUE@ GOARCH=`$(abs_builddir)/go$(EXEEXT) env GOARCH`; \ @NATIVE_TRUE@ GOOS=`$(abs_builddir)/go$(EXEEXT) env GOOS`; \ -@NATIVE_TRUE@ files=`$(SHELL) $(libgosrcdir)/../match.sh --goarch=$${GOARCH} --goos=$${GOOS} --srcdir=$(libgosrcdir)/runtime --extrafiles="$(libgodir)/runtime_sysinfo.go $(libgodir)/sigtab.go" --tag=libffi`; \ +@NATIVE_TRUE@ files=`$(SHELL) $(libgosrcdir)/../match.sh --goarch=$${GOARCH} --goos=$${GOOS} --srcdir=$(libgosrcdir)/runtime --extrafiles="$(libgodir)/runtime_linknames.go $(libgodir)/runtime_sysinfo.go $(libgodir)/sigtab.go" --tag=libffi`; \ @NATIVE_TRUE@ $(SHELL) $(libgosrcdir)/../testsuite/gotest --goarch=$${GOARCH} --goos=$${GOOS} --basedir=$(libgosrcdir)/.. --srcdir=$(libgosrcdir)/runtime --pkgpath=runtime --pkgfiles="$${files}" $(GOTESTFLAGS) -test.timeout=$(GOTOOLS_TEST_TIMEOUT)s -test.v >> runtime-testlog 2>&1 || echo "--- $${fl}: go test runtime (0.00s)" >> runtime-testlog @NATIVE_TRUE@ grep '^--- ' runtime-testlog | sed -e 's/^--- \(.*\) ([^)]*)$$/\1/' | sort -k 2 |