Make adding GDB index sections configurable.

Introduces _include_gdb_index macro and -i flag to find-debuginfo.sh to
enable or disable adding a .gdb_index section to debug files. Adds tests
to make sure the .gdb_index is really added (or not) when requested.
Checks that gdb-add-index is actually installed instead of silently
failing if not. Similar for dwz.

Signed-off-by: Mark Wielaard <mjw@redhat.com>

macros.debug

@@ -2,6 +2,7 @@
 
 %_enable_debug_packages 1
 %_include_minidebuginfo 1
+%_include_gdb_index    	1
 
 # Expanded at end of %install scriptlet
 

macros.in

@@ -178,7 +178,7 @@
 #	the script.  See the script for details.
 #
 %__debug_install_post   \
-   %{_rpmconfigdir}/find-debuginfo.sh %{?_missing_build_ids_terminate_build:--strict-build-id} %{?_include_minidebuginfo:-m} %{?_unique_build_ids:--ver-rel "%{version}-%{release}"} %{?_find_debuginfo_dwz_opts} %{?_find_debuginfo_opts} "%{_builddir}/%{?buildsubdir}"\
+   %{_rpmconfigdir}/find-debuginfo.sh %{?_missing_build_ids_terminate_build:--strict-build-id} %{?_include_minidebuginfo:-m} %{?_include_gdb_index:-i} %{?_unique_build_ids:--ver-rel "%{version}-%{release}"} %{?_find_debuginfo_dwz_opts} %{?_find_debuginfo_opts} "%{_builddir}/%{?buildsubdir}"\
 %{nil}
 
 #	Template for debug information sub-package.
@@ -453,6 +453,12 @@ package or when debugging this package.\
 #
 #%_include_minidebuginfo	1
 
+#
+# Include a .gdb_index section in the .debug files.
+# Requires _enable_debug_packages and gdb-add-index installed.
+#
+#%_include_gdb_index	1
+
 #
 # Defines how and if build_id links are generated for ELF files.
 # The following settings are supported:

scripts/find-debuginfo.sh

@@ -2,7 +2,7 @@
 #find-debuginfo.sh - automagically generate debug info and file list
 #for inclusion in an rpm spec file.
 #
-# Usage: find-debuginfo.sh [--strict-build-id] [-g] [-r] [-m]
+# Usage: find-debuginfo.sh [--strict-build-id] [-g] [-r] [-m] [-i]
 #	 		   [-o debugfiles.list]
 #			   [--run-dwz] [--dwz-low-mem-die-limit N]
 #			   [--dwz-max-die-limit N]
@@ -14,6 +14,8 @@
 # The --strict-build-id flag says to exit with failure status if
 # any ELF binary processed fails to contain a build-id note.
 # The -r flag says to use eu-strip --reloc-debug-sections.
+# The -m flag says to include a .gnu_debugdata section in the main binary.
+# The -i flag says to include a .gdb_index section in the .debug file.
 #
 # A single -o switch before any -l or -p switches simply renames
 # the primary output file from debugfiles.list to something else.
@@ -48,6 +50,9 @@ strip_r=false
 # with -m arg, add minimal debuginfo to binary.
 include_minidebug=false
 
+# with -i arg, add GDB index to .debug file.
+include_gdb_index=false
+
 # Barf on missing build IDs.
 strict=false
 
@@ -88,6 +93,9 @@ while [ $# -gt 0 ]; do
   -m)
     include_minidebug=true
     ;;
+  -i)
+    include_gdb_index=true
+    ;;
   -o)
     if [ -z "${lists[$nout]}" -a -z "${ptns[$nout]}" ]; then
       out=$2
@@ -266,7 +274,15 @@ while read nlinks inum f; do
     $strict && exit 2
   fi
 
-  [ type gdb-add-index >/dev/null 2>&1 && gdb-add-index "$f" > /dev/null 2>&1
+  # Add .gdb_index if requested.
+  if $include_gdb_index; then
+    if type gdb-add-index >/dev/null 2>&1; then
+      gdb-add-index "$f"
+    else
+      echo >&2 "*** ERROR: GDB index requested, but no gdb-add-index installed"
+      exit 2
+    fi
+  fi
 
   # A binary already copied into /usr/lib/debug doesn't get stripped,
   # just has its file names collected and adjusted.
@@ -292,7 +308,7 @@ while read nlinks inum f; do
 done || exit
 
 # Invoke the DWARF Compressor utility.
-if $run_dwz && type dwz >/dev/null 2>&1 \
+if $run_dwz \
    && [ -d "${RPM_BUILD_ROOT}/usr/lib/debug" ]; then
   dwz_files="`cd "${RPM_BUILD_ROOT}/usr/lib/debug"; find -type f -name \*.debug`"
   if [ -n "${dwz_files}" ]; then
@@ -310,7 +326,12 @@ if $run_dwz && type dwz >/dev/null 2>&1 \
       && dwz_opts="${dwz_opts} -l ${dwz_low_mem_die_limit}"
     [ -n "${dwz_max_die_limit}" ] \
       && dwz_opts="${dwz_opts} -L ${dwz_max_die_limit}"
-    ( cd "${RPM_BUILD_ROOT}/usr/lib/debug" && dwz $dwz_opts $dwz_files )
+    if type dwz >/dev/null 2>&1; then
+      ( cd "${RPM_BUILD_ROOT}/usr/lib/debug" && dwz $dwz_opts $dwz_files )
+    else
+      echo >&2 "*** ERROR: DWARF compression requested, but no dwz installed"
+      exit 2
+    fi
     # Remove .dwz directory if empty
     rmdir "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz" 2>/dev/null
     if [ -f "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz/${dwz_multifile_name}" ]; then

tests/rpmbuild.at

@@ -532,3 +532,64 @@ usr/local/bin/hello2
 ],
 [ignore])
 AT_CLEANUP
+
+# ------------------------------
+# Check that a GDB index is included when requested.
+AT_SETUP([rpmbuild debuginfo gdb index included])
+AT_KEYWORDS([build] [debuginfo] [gdb])
+AT_CHECK([
+rm -rf ${TOPDIR}
+AS_MKDIR_P(${TOPDIR}/SOURCES)
+
+# Build a package that has some debuginfo
+cp "${abs_srcdir}"/data/SOURCES/hello-1.0.tar.gz "${abs_srcdir}"/data/SOURCES/hello-1.0-modernize.patch ${TOPDIR}/SOURCES
+
+run rpmbuild --quiet \
+  --macros=${abs_top_builddir}/macros:${abs_top_builddir}/tests/testing/usr/local/lib/rpm/platform/%{_target_cpu}-%{_target_os}/macros:${top_srcdir}/macros.debug \
+  --rcfile=${abs_top_builddir}/rpmrc \
+  --define "_include_gdb_index 1" \
+  -ba "${abs_srcdir}"/data/SPECS/hello2.spec
+
+# Unpack the debuginfo rpms so we can check the .debug files.
+rpm2cpio ${abs_builddir}/testing/build/RPMS/*/hello2-debuginfo-1.0-1.*.rpm \
+  | cpio -diu --quiet
+
+# Check that gdb-add-index has ran and a .gdb_index section has been added
+readelf -S ./usr/lib/debug/usr/local/bin/hello2*.debug \
+  | grep gdb_index | cut -c8-17
+],
+[0],
+[.gdb_index
+],
+[ignore])
+AT_CLEANUP
+
+# ------------------------------
+# Check that a GDB index is NOT included when not requested.
+AT_SETUP([rpmbuild debuginfo no gdb index included])
+AT_KEYWORDS([build] [debuginfo] [gdb])
+AT_CHECK([
+rm -rf ${TOPDIR}
+AS_MKDIR_P(${TOPDIR}/SOURCES)
+
+# Build a package that has some debuginfo
+cp "${abs_srcdir}"/data/SOURCES/hello-1.0.tar.gz "${abs_srcdir}"/data/SOURCES/hello-1.0-modernize.patch ${TOPDIR}/SOURCES
+
+run rpmbuild --quiet \
+  --macros=${abs_top_builddir}/macros:${abs_top_builddir}/tests/testing/usr/local/lib/rpm/platform/%{_target_cpu}-%{_target_os}/macros:${top_srcdir}/macros.debug \
+  --rcfile=${abs_top_builddir}/rpmrc \
+  --undefine "_include_gdb_index" \
+  -ba "${abs_srcdir}"/data/SPECS/hello2.spec
+
+# Unpack the debuginfo rpms so we can check the .debug files.
+rpm2cpio ${abs_builddir}/testing/build/RPMS/*/hello2-debuginfo-1.0-1.*.rpm \
+  | cpio -diu --quiet
+
+# Check that gdb-add-index has not ran and no .gdb_index section has been added
+readelf -S ./usr/lib/debug/usr/local/bin/hello2*.debug \
+  | grep gdb_index | cut -c8-17
+],
+[0],
+[],
+[ignore])
+AT_CLEANUP