Build TurboJPEG/OSS with a version script to prevent any non-global symbols from being accessible (this is to protect against potential namespace conflicts when preloading it into an application via VirtualGL.)

Makefile.am

@@ -16,7 +16,14 @@ libjpeg_la_SOURCES = $(HDRS) jcapimin.c jcapistd.c jccoefct.c jccolor.c \
 	jfdctflt.c jfdctfst.c jfdctint.c jidctflt.c jidctfst.c jidctint.c \
 	jidctred.c jquant1.c jquant2.c jutils.c jmemmgr.c jmemnobs.c
 
-libturbojpeg_la_SOURCES = $(libjpeg_la_SOURCES) turbojpegl.c turbojpeg.h
+libturbojpeg_la_SOURCES = $(libjpeg_la_SOURCES) turbojpegl.c turbojpeg.h \
+	turbojpeg-mapfile
+
+if VERSION_SCRIPT
+
+libturbojpeg_la_LDFLAGS += -Wl,--version-script,$(srcdir)/turbojpeg-mapfile
+
+endif
 
 if WITH_SIMD
 

configure.ac

@@ -26,6 +26,17 @@ AC_PROG_INSTALL
 AC_PROG_LIBTOOL
 AC_PROG_LN_S
 
+AC_MSG_CHECKING([whether the linker supports version scripts])
+LDVER=`$LD --help < /dev/null 2>/dev/null | grep version-script`
+if test "$LDVER"; then
+  VERSION_SCRIPT=yes
+  AC_MSG_RESULT(yes)
+else
+  VERSION_SCRIPT=no
+  AC_MSG_RESULT(no)
+fi
+AM_CONDITIONAL(VERSION_SCRIPT, test "x$VERSION_SCRIPT" = "xyes")
+
 if test "x${GCC}" = "xyes"; then
   if test "x${SAVED_CFLAGS}" = "x"; then
     CFLAGS=-O3

turbojpeg-mapfile

@@ -0,0 +1,13 @@
+{
+	global:
+		tjInitCompress;
+		tjCompress;
+		TJBUFSIZE;
+		tjInitDecompress;
+		tjDecompressHeader;
+		tjDecompress;
+		tjDestroy;
+		tjGetErrorStr;
+	local:
+		*;
+};