feat(gcc): add libbacktrace-static subpackage

base/comps/gcc/overlays/0002-libbacktrace-static.overlay.toml

@@ -0,0 +1,67 @@
+# Azure Linux exposes GCC's internal libbacktrace as a standalone
+# `libbacktrace-static` subpackage. There is no upstream package to
+# import. Downstream consumers need the static library + header
+# at build time, so we install them here.
+
+[metadata]
+category = "azl-platform-adaptation"
+upstream-status = "inapplicable"
+
+# Bump the manual gcc release so the new subpackage and its dependents rebuild.
+[[overlays]]
+description = "Bump gcc release for the added libbacktrace-static subpackage"
+type = "spec-search-replace"
+regex = '^%global gcc_release 7$'
+replacement = "%global gcc_release 8"
+
+# Declare the new subpackage right after the C++ package/description block.
+[[overlays]]
+description = "Declare the libbacktrace-static subpackage"
+type = "spec-append-lines"
+section = "%description"
+package = "c++"
+lines = [
+    "%package -n libbacktrace-static",
+    "Summary: Static library for GCC's libbacktrace",
+    "",
+    "%description -n libbacktrace-static",
+    "This package contains GCC's static libbacktrace library and its header.",
+    "",
+]
+
+# Install the internal libbacktrace static archive and its header.
+[[overlays]]
+description = "Install libbacktrace static library and header into the buildroot"
+type = "spec-append-lines"
+section = "%install"
+lines = [
+    "# Azure Linux: expose GCC's internal libbacktrace as a static library + header.",
+    "_azl_bt=%{_builddir}/gcc-%{version}-%{DATE}/obj-%{gcc_target_platform}/libbacktrace/.libs/libbacktrace.a",
+    "install -m 0644 -D \"$_azl_bt\" %{buildroot}%{_libdir}/libbacktrace.a",
+    "install -m 0644 -D %{_builddir}/gcc-%{version}-%{DATE}/libbacktrace/backtrace.h %{buildroot}%{_includedir}/backtrace.h",
+    "",
+]
+
+# List the installed libbacktrace-static files.
+[[overlays]]
+description = "Package the libbacktrace-static files"
+type = "spec-append-lines"
+section = "%files"
+package = "c++"
+lines = [
+    "%files -n libbacktrace-static",
+    "%{_includedir}/backtrace.h",
+    "%{_libdir}/libbacktrace.a",
+    "",
+]
+
+[[overlays]]
+description = "Add changelog entry for the libbacktrace-static subpackage"
+type = "spec-prepend-lines"
+section = "%changelog"
+lines = [
+    "* Fri Aug 14 2026 Nan Liu <liunan@microsoft.com> - 15.2.1-8",
+    "- Add libbacktrace-static subpackage exposing GCC's internal libbacktrace",
+    "  static library and header for downstream consumers.",
+    "",
+]

locks/gcc.lock

@@ -2,5 +2,5 @@
 version = 1
 import-commit = 'fef47e540ee170873511546e35fc912cceed23f1'
 upstream-commit = 'fef47e540ee170873511546e35fc912cceed23f1'
-input-fingerprint = 'sha256:9cba33f3d0d76e1ebc779c654cb919773192af830efc66a9bc45454c89b42071'
+input-fingerprint = 'sha256:f7bfc24cb117570fda996fc1a6963305202fc45b15c114a7984cca4be7957394'
 resolution-input-hash = 'sha256:466421704711c4fd3c71f0b2ed715a0e61d49e3e26f3a2637fee755795849c8e'

specs/g/gcc/gcc.spec

@@ -7,7 +7,7 @@
 %global gcc_major 15
 # Note, gcc_release must be integer, if you want to add suffixes to
 # %%{release}, append them after %%{gcc_release} on Release: line.
-%global gcc_release 7
+%global gcc_release 8
 %global nvptx_tools_gitrev a0c1fff6534a4df9fb17937c3c4a4b1071212029
 %global newlib_cygwin_gitrev d35cc82b5ec15bb8a5fe0fe11e183d1887992e99
 %global _unpackaged_files_terminate_build 0
@@ -402,6 +402,12 @@ This package adds C++ support to the GNU Compiler Collection.
 It includes support for most of the current C++ specification,
 including templates and exception handling.
 
+%package -n libbacktrace-static
+Summary: Static library for GCC's libbacktrace
+
+%description -n libbacktrace-static
+This package contains GCC's static libbacktrace library and its header.
+
 %package -n libstdc++
 Summary: GNU Standard C++ Library
 Autoreq: true
@@ -2473,6 +2479,11 @@ ln -sf gcc-annobin.so.0.0.0 $FULLPATH/plugin/gcc-annobin.so.0
 ln -sf gcc-annobin.so.0.0.0 $FULLPATH/plugin/gcc-annobin.so
 %endif
 
+# Azure Linux: expose GCC's internal libbacktrace as a static library + header.
+_azl_bt=%{_builddir}/gcc-%{version}-%{DATE}/obj-%{gcc_target_platform}/libbacktrace/.libs/libbacktrace.a
+install -m 0644 -D "$_azl_bt" %{buildroot}%{_libdir}/libbacktrace.a
+install -m 0644 -D %{_builddir}/gcc-%{version}-%{DATE}/libbacktrace/backtrace.h %{buildroot}%{_includedir}/backtrace.h
+
 %check
 cd obj-%{gcc_target_platform}
 
@@ -3032,6 +3043,10 @@ end
 %endif
 %doc rpm.doc/changelogs/gcc/cp/ChangeLog*
 
+%files -n libbacktrace-static
+%{_includedir}/backtrace.h
+%{_libdir}/libbacktrace.a
+
 %files -n libstdc++
 %{_prefix}/%{_lib}/libstdc++.so.6*
 %dir %{_datadir}/gdb
@@ -3814,6 +3829,10 @@ end
 %endif
 
 %changelog
+* Fri Aug 14 2026 Nan Liu <liunan@microsoft.com> - 15.2.1-8
+- Add libbacktrace-static subpackage exposing GCC's internal libbacktrace
+  static library and header for downstream consumers.
+
 * Fri Jan 23 2026 Jakub Jelinek <jakub@redhat.com> 15.2.1-7
 - update from releases/gcc-15 branch
   - PRs c++/122070, c++/122550, c++/123597, libstdc++/123147,