[PATCH 1/2] configure.ac: Look for and use libzma on ELF systems

[Alexander Larsson]

This will be used for compressed debug info
---
 gdb/Makefile.in  |    5 ++++-
 gdb/configure.ac |   19 +++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 0e87eeb..06965d2 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -151,6 +151,9 @@ READLINE_CFLAGS = @READLINE_CFLAGS@
 # Where is expat?  This will be empty if expat was not available.
 LIBEXPAT = @LIBEXPAT@
 
+# Where is lzma?  This will be empty if lzma was not available.
+LIBLZMA = @LIBLZMA@
+
 WARN_CFLAGS = @WARN_CFLAGS@
 WERROR_CFLAGS = @WERROR_CFLAGS@
 GDB_WARN_CFLAGS = $(WARN_CFLAGS)
@@ -467,7 +470,7 @@ INTERNAL_LDFLAGS = $(CFLAGS) $(GLOBAL_CFLAGS) $(MH_LDFLAGS) $(LDFLAGS) $(CONFIG_
 # LIBIBERTY appears twice on purpose.
 CLIBS = $(SIM) $(READLINE) $(OPCODES) $(BFD) $(INTL) $(LIBIBERTY) $(LIBDECNUMBER) \
 	$(XM_CLIBS) $(NAT_CLIBS) $(GDBTKLIBS) @LIBS@ @PYTHON_LIBS@ \
-	$(LIBEXPAT) \
+	$(LIBEXPAT) $(LIBLZMA) \
 	$(LIBIBERTY) $(WIN32LIBS) $(LIBGNU)
 CDEPS = $(XM_CDEPS) $(NAT_CDEPS) $(SIM) $(BFD) $(READLINE_DEPS) \
 	$(OPCODES) $(INTL_DEPS) $(LIBIBERTY) $(CONFIG_DEPS) $(LIBGNU)
diff --git a/gdb/configure.ac b/gdb/configure.ac
index a40c2e5..84282a9 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1962,6 +1962,25 @@ LIBS=$OLD_LIBS
 # Add any host-specific objects to GDB.
 CONFIG_OBS="${CONFIG_OBS} ${gdb_host_obs}"
 
+# If building on ELF, look for lzma support for embedded compressed debug info.
+if test $gdb_cv_var_elf = yes; then
+  AC_ARG_WITH(lzma,
+    AS_HELP_STRING([--with-lzma], [support lzma compression (auto/yes/no)]),
+    [], [with_lzma=auto])
+  AC_MSG_CHECKING([whether to use lzma])
+  AC_MSG_RESULT([$with_lzma])
+
+  if test "${with_lzma}" != no; then
+    AC_LIB_HAVE_LINKFLAGS([lzma], [], [#include "lzma.h"],
+			  [lzma_mf_is_supported (LZMA_MF_HC3);])
+    if test "$HAVE_LIBLZMA" != yes; then
+      if test "$with_lzma" = yes; then
+        AC_MSG_ERROR([missing liblzma for --with-lzma])
+      fi
+    fi
+  fi
+fi
+
 LIBGUI="../libgui/src/libgui.a"
 GUI_CFLAGS_X="-I${srcdir}/../libgui/src"
 AC_SUBST(LIBGUI)
-- 
1.7.10


--=-nUpgN84IRMvHgzZDFTdS
Content-Disposition: attachment;
	filename="0002-Support-lzma-compressed-.gnu_debugdata-sections.patch"
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	charset="UTF-8"
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