Build: Remove the static/dynamic tricks.

Most distros want xz linked against shared liblzma, so
it doesn't help much to require --enable-dynamic for that.
Those who want to avoid PIC on x86-32 to get better
performance, can still do it e.g. by using --disable-shared
to compile xz and then another pass to compile shared liblzma.

Part of these static/dynamic tricks were needed for Windows
in the past. Nowadays we rely on GCC and binutils to do the
right thing with auto-import. If the Autotooled build system
needs to support some other toolchain on Windows in the future,
this may need some rethinking.

configure.ac

@@ -369,41 +369,6 @@ AC_DEFINE_UNQUOTED([ASSUME_RAM], [$enable_assume_ram],
 		be determined.])
 
 
-############################################
-# xz/xzdec/lzmadec linkage against liblzma #
-############################################
-
-# Link the xz, xzdec, and lzmadec command line tools against static liblzma
-# unless using --enable-dynamic. Using static liblzma gives a little bit
-# faster executable on x86, because no register is wasted for PIC. We also
-# have one dependency less, which allows users to more freely copy the xz
-# binary to other boxes. However, I wouldn't be surprised if distro
-# maintainers still prefer dynamic linking, so let's make it easy for them.
-
-AC_MSG_CHECKING([how programs should be linked against liblzma])
-AC_ARG_ENABLE([dynamic], [AC_HELP_STRING([--enable-dynamic=TYPE],
-			[Set how command line tools are linked against liblzma.
-			TYPE can be mixed, yes, or no. The default is mixed.])],
-		[], [enable_dynamic=mixed])
-case $enable_dynamic in
-	mixed)
-		AC_MSG_RESULT([mixed (some dynamically, some statically)])
-		;;
-	yes)
-		AC_MSG_RESULT([dynamically])
-		;;
-	no)
-		AC_MSG_RESULT([statically])
-		;;
-	*)
-		AC_MSG_RESULT([])
-		AC_MSG_ERROR([--enable-dynamic accepts only \`mixed', \`yes', or \`no'])
-		;;
-esac
-# We use the actual results later, because we don't know yet
-# if --disable-shared or --disable-static was used.
-
-
 ###############################################################################
 # Checks for programs.
 ###############################################################################
@@ -611,45 +576,6 @@ AM_CONDITIONAL([COND_GNULIB], test -n "$LIBOBJS")
 # Add default AM_CFLAGS.
 AC_SUBST([AM_CFLAGS])
 
-# Set additional flags for static/dynamic linking. The idea is that every
-# program (not library) being built will use either STATIC_{CPPFLAGS,LDFLAGS}
-# or DYNAMIC_{CPPFLAGS,LDFLAGS} depending on which type of linkage is
-# preferred. These preferences get overridden by use of --disable-static,
-# --disable-shared, or --enable-dynamic.
-#
-# This is quite messy, because we want to use LZMA_API_STATIC when linking
-# against static liblzma. It's needed on Windows.
-if test "x$enable_static" = xno; then
-	enable_dynamic=yes
-fi
-if test "x$enable_shared" = xno; then
-	enable_dynamic=no
-fi
-case $enable_dynamic in
-	yes)
-		STATIC_CPPFLAGS=
-		STATIC_LDFLAGS=
-		DYNAMIC_CPPFLAGS=
-		DYNAMIC_LDFLAGS=
-		;;
-	mixed)
-		STATIC_CPPFLAGS="-DLZMA_API_STATIC"
-		STATIC_LDFLAGS="-static"
-		DYNAMIC_CPPFLAGS=
-		DYNAMIC_LDFLAGS=
-		;;
-	no)
-		STATIC_CPPFLAGS="-DLZMA_API_STATIC"
-		STATIC_LDFLAGS="-static"
-		DYNAMIC_CPPFLAGS="-DLZMA_API_STATIC"
-		DYNAMIC_LDFLAGS="-static"
-		;;
-esac
-AC_SUBST([STATIC_CPPFLAGS])
-AC_SUBST([STATIC_LDFLAGS])
-AC_SUBST([DYNAMIC_CPPFLAGS])
-AC_SUBST([DYNAMIC_LDFLAGS])
-
 # This is needed for src/scripts.
 xz=`echo xz | sed "$program_transform_name"`
 AC_SUBST([xz])

debug/Makefile.am

@@ -16,10 +16,7 @@ noinst_PROGRAMS = \
 
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/common \
-	-I$(top_srcdir)/src/liblzma/api \
-	$(STATIC_CPPFLAGS)
-
-AM_LDFLAGS = $(STATIC_LDFLAGS)
+	-I$(top_srcdir)/src/liblzma/api
 
 LDADD = $(top_builddir)/src/liblzma/liblzma.la
 

src/lzmainfo/Makefile.am

@@ -16,10 +16,8 @@ lzmainfo_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-I$(top_srcdir)/src/common \
 	-I$(top_srcdir)/src/liblzma/api \
-	-I$(top_builddir)/lib \
-	$(DYNAMIC_CPPFLAGS)
+	-I$(top_builddir)/lib
 
-lzmainfo_LDFLAGS = $(DYNAMIC_LDFLAGS)
 lzmainfo_LDADD = $(top_builddir)/src/liblzma/liblzma.la
 
 if COND_GNULIB

src/xz/Makefile.am

@@ -46,10 +46,8 @@ xz_CPPFLAGS = \
 	-DLOCALEDIR=\"$(localedir)\" \
 	-I$(top_srcdir)/src/common \
 	-I$(top_srcdir)/src/liblzma/api \
-	-I$(top_builddir)/lib \
-	$(STATIC_CPPFLAGS)
+	-I$(top_builddir)/lib
 
-xz_LDFLAGS = $(STATIC_LDFLAGS)
 xz_LDADD = $(top_builddir)/src/liblzma/liblzma.la
 
 if COND_GNULIB

src/xzdec/Makefile.am

@@ -27,9 +27,7 @@ xzdec_CPPFLAGS = \
 	-DTUKLIB_GETTEXT=0 \
 	-I$(top_srcdir)/src/common \
 	-I$(top_srcdir)/src/liblzma/api \
-	-I$(top_builddir)/lib \
-	$(STATIC_CPPFLAGS)
-xzdec_LDFLAGS = $(STATIC_LDFLAGS)
+	-I$(top_builddir)/lib
 xzdec_LDADD = $(top_builddir)/src/liblzma/liblzma.la
 
 if COND_GNULIB

tests/Makefile.am

@@ -17,10 +17,7 @@ EXTRA_DIST = \
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/common \
 	-I$(top_srcdir)/src/liblzma/api \
-	-I$(top_builddir)/lib \
-	$(STATIC_CPPFLAGS)
-
-AM_LDFLAGS = $(STATIC_LDFLAGS)
+	-I$(top_builddir)/lib
 
 LDADD = $(top_builddir)/src/liblzma/liblzma.la