added --enable-shared option to darshan-util configure script

git-svn-id: https://svn.mcs.anl.gov/repos/darshan/trunk@886 3b7491f3-a168-0410-bf4b-c445ed680a29

darshan-util/Makefile.in

@@ -12,17 +12,21 @@ bindir = $(DESTDIR)@bindir@
 libdir = $(DESTDIR)@libdir@
 pkgconfigdir = $(DESTDIR)$(libdir)/pkgconfig
 
-DISABLE_LDPRELOAD = @DISABLE_LDPRELOAD@
 DARSHAN_LOG_FORMAT = $(srcdir)/../darshan-log-format.h
+DARSHAN_ENABLE_SHARED=@DARSHAN_ENABLE_SHARED@
 
 VPATH = $(srcdir)
 
+ifeq ($(DARSHAN_ENABLE_SHARED),1)
+all: libdarshan-util.so
+endif
 cp_zlib_link_flags = @__CP_ZLIB_LINK_FLAGS@
 cp_zlib_include_flags = @__CP_ZLIB_INCLUDE_FLAGS@
 
 # deliberately avoid large file support for host side utilities to avoid
 # potentially buggy libz 64 bit offset support
 CFLAGS = -I . -I $(srcdir) -I $(srcdir)/../ -DDARSHAN_CONFIG_H=\"darshan-util-config.h\" @CFLAGS@ @CPPFLAGS@ 
+CFLAGS_SHARED = $(CFLAGS) -shared -fpic -DPIC 
 LDFLAGS=@LDFLAGS@
 
 CC=@CC@
@@ -58,7 +62,12 @@ darshan-diff.o: darshan-diff.c
 	$(CC) $(CFLAGS) -c  $< -o $@
 darshan-logutils.o: darshan-logutils.c
 	$(CC) $(CFLAGS) -c  $< -o $@
+darshan-logutils.po: darshan-logutils.c
+	$(CC) $(CFLAGS_SHARED) -c  $< -o $@
 
+libdarshan-util.so: darshan-logutils.po
+	$(CC) $(CFLAGS_SHARED) $(LDFLAGS) -o $@ $^ $(LIBS)
+	
 darshan-util-lib: darshan-logutils.o
 	ar rcs libdarshan-util.a $<
 
@@ -82,6 +91,9 @@ install:: all
 	install -m 755 darshan-analyzer $(bindir)
 	install -m 755 $(srcdir)/darshan-summary-per-file.sh $(bindir)
 	install -m 755 libdarshan-util.a $(libdir)
+ifeq ($(DARSHAN_ENABLE_SHARED),1)
+	install -m 755 libdarshan-util.so $(libdir)
+endif
 	install -m 644 $(srcdir)/darshan-logutils.h $(includedir)
 	install -m 644 $(DARSHAN_LOG_FORMAT) $(includedir)
 	install -m 755 darshan-job-summary/bin/darshan-job-summary.pl $(bindir)

darshan-util/configure

@@ -621,6 +621,7 @@ ac_includes_default="\
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+DARSHAN_ENABLE_SHARED
 __CP_PDFLATEX_HALT_ON_ERROR
 __CP_ZLIB_INCLUDE_FLAGS
 __CP_ZLIB_LINK_FLAGS
@@ -683,6 +684,7 @@ ac_user_opts='
 enable_option_checking
 with_zlib
 with_bzlib
+enable_shared
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1298,6 +1300,12 @@ if test -n "$ac_init_help"; then
    esac
   cat <<\_ACEOF
 
+Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --enable-shared   enables building of shared darshan-util library
+
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
@@ -4162,6 +4170,16 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 CFLAGS="$old_cflags"
 
+DARSHAN_ENABLE_SHARED=0
+# Check whether --enable-shared was given.
+if test "${enable_shared+set}" = set; then :
+  enableval=$enable_shared; if test "x$enableval" = "xyes" ; then
+    DARSHAN_ENABLE_SHARED=1
+fi
+
+fi
+
+
 for ac_func in strndup
 do :
   ac_fn_c_check_func "$LINENO" "strndup" "ac_cv_func_strndup"
@@ -4177,6 +4195,7 @@ done
 
 
 
+
 ac_config_files="$ac_config_files Makefile darshan-job-summary/bin/darshan-job-summary.pl maint/darshan-util.pc"
 
 cat >confcache <<\_ACEOF

darshan-util/configure.in

@@ -70,11 +70,20 @@ AC_TRY_COMPILE(
 )
 CFLAGS="$old_cflags"
 
+DARSHAN_ENABLE_SHARED=0
+AC_ARG_ENABLE(shared, 
+[  --enable-shared   enables building of shared darshan-util library], 
+[if test "x$enableval" = "xyes" ; then
+    DARSHAN_ENABLE_SHARED=1
+fi]
+,)
+
 AC_CHECK_FUNCS([strndup])
 
 AC_SUBST(__CP_ZLIB_LINK_FLAGS)
 AC_SUBST(__CP_ZLIB_INCLUDE_FLAGS)
 AC_SUBST(__CP_PDFLATEX_HALT_ON_ERROR)
+AC_SUBST(DARSHAN_ENABLE_SHARED)
 AC_OUTPUT(Makefile
 darshan-job-summary/bin/darshan-job-summary.pl
 maint/darshan-util.pc

darshan-util/doc/darshan-util.txt

@@ -55,6 +55,9 @@ specify alternative paths for zlib and libbz2 development libraries.
 darshan-util also supports VPATH or "out-of-tree" builds if you prefer that
 method of compilation.
 
+The `--enable-shared` argument to configure can be used to enable
+compilation of a shared version of the darshan-util library.
+
 == Analyzing log files
 
 Each time a darshan-instrumented application is executed, it will generate a