alexk / rpms / rpm

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--- rpm-4.10.0/macros.in	2012-06-11 11:16:21.216952339 +0200
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+++ rpm-4.10.0/macros.in.minidebug	2012-06-11 11:16:23.686912455 +0200
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@@ -175,7 +175,7 @@ 
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 #	the script.  See the script for details.
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 #
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 %__debug_install_post   \
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-   %{_rpmconfigdir}/find-debuginfo.sh %{?_missing_build_ids_terminate_build:--strict-build-id} %{?_find_debuginfo_dwz_opts} %{?_find_debuginfo_opts} "%{_builddir}/%{?buildsubdir}"\
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+   %{_rpmconfigdir}/find-debuginfo.sh %{?_missing_build_ids_terminate_build:--strict-build-id} %{?_include_minidebuginfo:-m} %{?_find_debuginfo_dwz_opts} %{?_find_debuginfo_opts} "%{_builddir}/%{?buildsubdir}"\
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 %{nil}
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 #	Template for debug information sub-package.
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@@ -418,6 +418,12 @@ package or when debugging this package.\
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 #%_missing_build_ids_terminate_build	1
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 #
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+# Include minimal debug information in build binaries.
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+# Requires _enable_debug_packages.
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+#
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+#%_include_minidebuginfo	1
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+
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+#
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 # Use internal dependency generator rather than external helpers?
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 %_use_internal_dependency_generator	1
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--- rpm-4.10.0/scripts/find-debuginfo.sh	2012-06-11 11:16:09.698138273 +0200
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+++ rpm-4.10.0/scripts/find-debuginfo.sh.minidebug	2012-06-11 11:16:13.399078526 +0200
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@@ -2,7 +2,7 @@ 
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 #find-debuginfo.sh - automagically generate debug info and file list
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 #for inclusion in an rpm spec file.
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 #
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-# Usage: find-debuginfo.sh [--strict-build-id] [-g] [-r]
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+# Usage: find-debuginfo.sh [--strict-build-id] [-g] [-r] [-m]
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 #	 		   [-o debugfiles.list]
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 #			   [--run-dwz] [--dwz-low-mem-die-limit N]
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 #			   [--dwz-max-die-limit N]
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@@ -29,6 +29,9 @@ strip_g=false
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 # with -r arg, pass --reloc-debug-sections to eu-strip.
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 strip_r=false
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+# with -m arg, add minimal debuginfo to binary.
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+include_minidebug=false
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+
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 # Barf on missing build IDs.
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 strict=false
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@@ -43,6 +46,9 @@ while [ $# -gt 0 ]; do
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   -g)
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     strip_g=true
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     ;;
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+  -m)
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+    include_minidebug=true
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+    ;;
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   -o)
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     if [ -z "${lists[$nout]}" -a -z "${ptns[$nout]}" ]; then
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       out=$2
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@@ -105,6 +111,32 @@ strip_to_debug()
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   chmod 444 "$1" || exit
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 }
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+add_minidebug()
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+{
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+  local debuginfo="$1"
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+  local binary="$2"
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+
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+  local dynsyms=`mktemp`
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+  local funcsyms=`mktemp`
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+  local keep_symbols=`mktemp`
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+  local mini_debuginfo=`mktemp`
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+
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+  # Extract the dynamic symbols from the main binary, there is no need to also have these
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+  # in the normal symbol table
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+  nm -D "$binary" --format=posix --defined-only | awk '{ print $1 }' | sort > "$dynsyms"
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+  # Extract all the text (i.e. function) symbols from the debuginfo 
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+  nm "$debuginfo" --format=posix --defined-only | awk '{ if ($2 == "T" || $2 == "t") print $1 }' | sort > "$funcsyms"
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+  # Keep all the function symbols not already in the dynamic symbol table
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+  comm -13 "$dynsyms" "$funcsyms" > "$keep_symbols"
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+  # Copy the full debuginfo, keeping only a minumal set of symbols and removing some unnecessary sections
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+  objcopy -S --remove-section .gdb_index --remove-section .comment --keep-symbols="$keep_symbols" "$debuginfo" "$mini_debuginfo" &> /dev/null
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+  #Inject the compressed data into the .gnu_debugdata section of the original binary
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+  xz "$mini_debuginfo"
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+  mini_debuginfo="${mini_debuginfo}.xz"
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+  objcopy --add-section .gnu_debugdata="$mini_debuginfo" "$binary"
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+  rm -f "$dynsyms" "$funcsyms" "$keep_symbols" "$mini_debuginfo"
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+}
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+
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 # Make a relative symlink to $1 called $3$2
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 shopt -s extglob
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 link_relative()
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@@ -260,6 +292,9 @@ while read nlinks inum f; do
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     chmod u-w "$f"
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   fi
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+  $include_minidebug && add_minidebug "${debugfn}" "$f"
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+
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+  
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   if [ -n "$id" ]; then
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     make_id_link "$id" "$dn/$(basename $f)"
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     make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug