make possible to override default traceback level at build time

add sub-package race containing std lib built with -race enabled
Related: BZ#1411242

fedora.go

@@ -0,0 +1,7 @@
+// +build rpm_crashtraceback
+
+package runtime
+
+func init() {
+	setTraceback("crash")
+}

golang.spec

@@ -61,6 +61,13 @@
 %global shared 0
 %endif
 
+# Pre build std lib with -race enabled
+%ifarch x86_64
+%global race 1
+%else
+%global race 0
+%endif
+
 # Fedora GOROOT
 %global goroot          /usr/lib/%{name}
 
@@ -91,12 +98,14 @@
 
 Name:           golang
 Version:        1.8
-Release:        0.rc3.1%{?dist}
+Release:        0.rc3.2%{?dist}
 Summary:        The Go Programming Language
 # source tree includes several copies of Mark.Twain-Tom.Sawyer.txt under Public Domain
 License:        BSD and Public Domain
 URL:            http://golang.org/
 Source0:        https://storage.googleapis.com/golang/go%{go_version}.src.tar.gz
+# make possible to override default traceback level at build time by setting build tag rpm_crashtraceback
+Source1:        fedora.go
 
 # The compiler is written in Go. Needs go(1.4+) compiler for build.
 %if !%{golang_bootstrap}
@@ -237,6 +246,16 @@ Summary:        Golang shared object libraries
 %{summary}.
 %endif
 
+%if %{race}
+%package        race
+Summary:        Golang std library with -race enabled
+
+Requires:       %{name} = %{version}-%{release}
+
+%description    race
+%{summary}
+%endif
+
 %prep
 %setup -q -n go
 
@@ -250,6 +269,8 @@ Summary:        Golang shared object libraries
 
 %patch219 -p1
 
+cp %{SOURCE1} ./src/runtime/
+
 %build
 # print out system information
 uname -a
@@ -291,6 +312,10 @@ popd
 GOROOT=$(pwd) PATH=$(pwd)/bin:$PATH go install -buildmode=shared std
 %endif
 
+%if %{race}
+GOROOT=$(pwd) PATH=$(pwd)/bin:$PATH go install -race std
+%endif
+
 %install
 rm -rf $RPM_BUILD_ROOT
 
@@ -313,17 +338,18 @@ cwd=$(pwd)
 src_list=$cwd/go-src.list
 pkg_list=$cwd/go-pkg.list
 shared_list=$cwd/go-shared.list
+race_list=$cwd/go-race.list
 misc_list=$cwd/go-misc.list
 docs_list=$cwd/go-docs.list
 tests_list=$cwd/go-tests.list
-rm -f $src_list $pkg_list $docs_list $misc_list $tests_list $shared_list
-touch $src_list $pkg_list $docs_list $misc_list $tests_list $shared_list
+rm -f $src_list $pkg_list $docs_list $misc_list $tests_list $shared_list $race_list
+touch $src_list $pkg_list $docs_list $misc_list $tests_list $shared_list $race_list
 pushd $RPM_BUILD_ROOT%{goroot}
     find src/ -type d -a \( ! -name testdata -a ! -ipath '*/testdata/*' \) -printf '%%%dir %{goroot}/%p\n' >> $src_list
     find src/ ! -type d -a \( ! -ipath '*/testdata/*' -a ! -name '*_test*.go' \) -printf '%{goroot}/%p\n' >> $src_list
 
-    find bin/ pkg/ -type d -a ! -path '*_dynlink/*' -printf '%%%dir %{goroot}/%p\n' >> $pkg_list
-    find bin/ pkg/ ! -type d -a ! -path '*_dynlink/*' -printf '%{goroot}/%p\n' >> $pkg_list
+    find bin/ pkg/ -type d -a ! -path '*_dynlink/*' -a ! -path '*_race/*' -printf '%%%dir %{goroot}/%p\n' >> $pkg_list
+    find bin/ pkg/ ! -type d -a ! -path '*_dynlink/*' -a ! -path '*_race/*' -printf '%{goroot}/%p\n' >> $pkg_list
 
     find doc/ -type d -printf '%%%dir %{goroot}/%p\n' >> $docs_list
     find doc/ ! -type d -printf '%{goroot}/%p\n' >> $docs_list
@@ -348,6 +374,13 @@ pushd $RPM_BUILD_ROOT%{goroot}
 	find pkg/*_dynlink/ ! -type d -printf '%{goroot}/%p\n' >> $shared_list
 %endif
 
+%if %{race}
+
+    find pkg/*_race/ -type d -printf '%%%dir %{goroot}/%p\n' >> $race_list
+    find pkg/*_race/ ! -type d -printf '%{goroot}/%p\n' >> $race_list
+
+%endif
+
     find test/ -type d -printf '%%%dir %{goroot}/%p\n' >> $tests_list
     find test/ ! -type d -printf '%{goroot}/%p\n' >> $tests_list
     find src/ -type d -a \( -name testdata -o -ipath '*/testdata/*' \) -printf '%%%dir %{goroot}/%p\n' >> $tests_list
@@ -465,7 +498,16 @@ fi
 %files -f go-shared.list shared
 %endif
 
+%if %{race}
+%files -f go-race.list race
+%endif
+
 %changelog
+* Fri Jan 27 2017 Jakub Čajka <jcajka@redhat.com> - 1.8-0.rc3.2
+- make possible to override default traceback level at build time
+- add sub-package race containing std lib built with -race enabled
+- Related: BZ#1411242
+
 * Fri Jan 27 2017 Jakub Čajka <jcajka@redhat.com> - 1.8-0.rc3.1
 - rebase to go1.8rc3
 - Resolves: BZ#1411242