Build system fixes

Don't use libtool convenience libraries to avoid recently
discovered long-standing subtle but somewhat severe bugs
in libtool (at least 1.5.22 and 2.2.6 are affected). It
was found when porting XZ Utils to Windows
<http://lists.gnu.org/archive/html/libtool/2009-06/msg00070.html>
but the problem is significant also e.g. on GNU/Linux.

Unless --disable-shared is passed to configure, static
library built from a set of convenience libraries will
contain PIC objects. That is, while libtool builds non-PIC
objects too, only PIC objects will be used from the
convenience libraries. On 32-bit x86 (tested on mobile XP2400+),
using PIC instead of non-PIC makes the decompressor 10 % slower
with the default CFLAGS.

So while xz was linked against static liblzma by default,
it got the slower PIC objects unless --disable-shared was
used. I tend develop and benchmark with --disable-shared
due to faster build time, so I hadn't noticed the problem
in benchmarks earlier.

This commit also adds support for building Windows resources
into liblzma and executables.

1 files changed, 20 insertions, 0 deletions

diff --git a/src/liblzma/subblock/Makefile.inc b/src/liblzma/subblock/Makefile.inc
new file mode 100644
index 00000000..a4710cc5
--- /dev/null
+++ b/src/liblzma/subblock/Makefile.inc
@@ -0,0 +1,20 @@
+##
+## Author: Lasse Collin
+##
+## This file has been put into the public domain.
+## You can do whatever you want with this file.
+##
+
+if COND_ENCODER_SUBBLOCK
+liblzma_la_SOURCES += \
+	subblock/subblock_encoder.c \
+	subblock/subblock_encoder.h
+endif
+
+if COND_DECODER_SUBBLOCK
+liblzma_la_SOURCES += \
+	subblock/subblock_decoder.c \
+	subblock/subblock_decoder.h \
+	subblock/subblock_decoder_helper.c \
+	subblock/subblock_decoder_helper.h
+endif