pcre/pcre-visibility.patch

Index: configure.ac
===================================================================
--- configure.ac.orig
+++ configure.ac
@@ -45,8 +45,12 @@ AC_CONFIG_MACRO_DIR([m4])
 remember_set_CFLAGS="$CFLAGS"
 remember_set_CXXFLAGS="$CXXFLAGS"
 
-AC_PROG_CC
+AC_PROG_CC_STDC
+AC_USE_SYSTEM_EXTENSIONS
+AC_SYS_LARGEFILE
+AM_PROG_CC_C_O
 AC_PROG_CXX
+PCRE_VISIBILITY
 
 if test "x$remember_set_CFLAGS" = "x"
 then
@@ -80,8 +84,7 @@ AC_LANG_POP
 AC_TYPE_INT64_T
 
 AC_PROG_INSTALL
-AC_LIBTOOL_WIN32_DLL
-LT_INIT
+LT_INIT([win32-dll pic-only disable-static])
 AC_PROG_LN_S
 
 PCRE_MAJOR="pcre_major"
Index: m4/visibility.m4
===================================================================
--- /dev/null
+++ m4/visibility.m4
@@ -0,0 +1,89 @@
+# visibility.m4 serial 4 (gettext-0.18.2)
+dnl Copyright (C) 2005, 2008, 2010-2011 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Bruno Haible.
+
+dnl Tests whether the compiler supports the command-line option
+dnl -fvisibility=hidden and the function and variable attributes
+dnl __attribute__((__visibility__("hidden"))) and
+dnl __attribute__((__visibility__("default"))).
+dnl Does *not* test for __visibility__("protected") - which has tricky
+dnl semantics (see the 'vismain' test in glibc) and does not exist e.g. on
+dnl MacOS X.
+dnl Does *not* test for __visibility__("internal") - which has processor
+dnl dependent semantics.
+dnl Does *not* test for #pragma GCC visibility push(hidden) - which is
+dnl "really only recommended for legacy code".
+dnl Set the variable CFLAG_VISIBILITY.
+dnl Defines and sets the variable HAVE_VISIBILITY.
+
+dnl Modified to fit with PCRE build environment by Cristian Rodríguez.
+
+AC_DEFUN([PCRE_VISIBILITY],
+[
+  AC_REQUIRE([AC_PROG_CC])
+  CFLAG_VISIBILITY=
+  CXXFLAG_INLINES_HIDDEN=
+  HAVE_VISIBILITY=0
+  if test -n "$GCC"; then
+    dnl First, check whether -Werror can be added to the command line, or
+    dnl whether it leads to an error because of some other option that the
+    dnl user has put into $CC $CFLAGS $CPPFLAGS.
+    AC_MSG_CHECKING([whether the -Werror option is usable])
+    AC_CACHE_VAL([gl_cv_cc_vis_werror], [
+      gl_save_CFLAGS="$CFLAGS"
+      CFLAGS="$CFLAGS -Werror"
+      AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM([[]], [[]])],
+        [gl_cv_cc_vis_werror=yes],
+        [gl_cv_cc_vis_werror=no])
+      CFLAGS="$gl_save_CFLAGS"])
+    AC_MSG_RESULT([$gl_cv_cc_vis_werror])
+    dnl Now check whether visibility declarations are supported.
+    AC_MSG_CHECKING([for simple visibility declarations])
+    AC_CACHE_VAL([gl_cv_cc_visibility], [
+      gl_save_CFLAGS="$CFLAGS"
+      CFLAGS="$CFLAGS -fvisibility=hidden"
+      dnl We use the option -Werror and a function dummyfunc, because on some
+      dnl platforms (Cygwin 1.7) the use of -fvisibility triggers a warning
+      dnl "visibility attribute not supported in this configuration; ignored"
+      dnl at the first function definition in every compilation unit, and we
+      dnl don't want to use the option in this case.
+      if test $gl_cv_cc_vis_werror = yes; then
+        CFLAGS="$CFLAGS -Werror"
+      fi
+      AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[extern __attribute__((__visibility__("hidden"))) int hiddenvar;
+             extern __attribute__((__visibility__("default"))) int exportedvar;
+             extern __attribute__((__visibility__("hidden"))) int hiddenfunc (void);
+             extern __attribute__((__visibility__("default"))) int exportedfunc (void);
+             void dummyfunc (void) {}
+           ]],
+           [[]])],
+        [gl_cv_cc_visibility=yes],
+        [gl_cv_cc_visibility=no])
+      CFLAGS="$gl_save_CFLAGS"])
+    AC_MSG_RESULT([$gl_cv_cc_visibility])
+    if test $gl_cv_cc_visibility = yes; then
+      CFLAG_VISIBILITY="-fvisibility=hidden"
+      CXXFLAG_INLINES_HIDDEN="-fvisibility-inlines-hidden"
+      HAVE_VISIBILITY=1
+      AC_DEFINE(PCRE_EXP_DECL, [extern __attribute__ ((visibility ("default")))], [to make a symbol visible])
+      AC_DEFINE(PCRE_EXP_DEFN, [__attribute__ ((visibility ("default")))], [to make a symbol visible])
+      AC_DEFINE(PCRE_EXP_DATA_DEFN, [__attribute__ ((visibility ("default")))], [to make a symbol visible])
+      AC_DEFINE(PCREPOSIX_EXP_DECL, [extern __attribute__ ((visibility ("default")))], [to make a symbol visible])
+      AC_DEFINE(PCREPOSIX_EXP_DEFN, [extern __attribute__ ((visibility ("default")))], [to make a symbol visible])
+      AC_DEFINE(PCRECPP_EXP_DECL, [extern __attribute__ ((visibility ("default")))], [to make a symbol visible])
+      AC_DEFINE(PCRECPP_EXP_DEFN, [__attribute__ ((visibility ("default")))], [to make a symbol visible])
+    fi
+  fi
+  AC_SUBST([CFLAG_VISIBILITY])
+  AC_SUBST([CXXFLAG_INLINES_HIDDEN])
+  AC_SUBST([HAVE_VISIBILITY])
+  AC_DEFINE_UNQUOTED([HAVE_VISIBILITY], [$HAVE_VISIBILITY],
+    [Define to 1 or 0, depending whether the compiler supports simple visibility declarations.])
+])
Index: Makefile.am
===================================================================
--- Makefile.am.orig
+++ Makefile.am
@@ -179,6 +179,9 @@ BUILT_SOURCES = pcre_chartables.c
 # Build the 8 bit library if it is enabled.
 if WITH_PCRE8
 lib_LTLIBRARIES += libpcre.la
+
+libpcre_la_CFLAGS = $(CFLAG_VISIBILITY)
+
 libpcre_la_SOURCES = \
   pcre_byte_order.c \
   pcre_compile.c \
@@ -212,6 +215,7 @@ endif # WITH_PCRE8
 # Build the 16 bit library if it is enabled.
 if WITH_PCRE16
 lib_LTLIBRARIES += libpcre16.la
+libpcre16_la_CFLAGS = $(CFLAG_VISIBILITY)
 libpcre16_la_SOURCES = \
   pcre16_byte_order.c \
   pcre16_chartables.c \
@@ -267,10 +271,10 @@ EXTRA_DIST += \
   sljit/sljitUtils.c
 
 if WITH_PCRE8
-libpcre_la_LDFLAGS = $(EXTRA_LIBPCRE_LDFLAGS)
+libpcre_la_LDFLAGS = -no-undefined $(EXTRA_LIBPCRE_LDFLAGS)
 endif # WITH_PCRE8
 if WITH_PCRE16
-libpcre16_la_LDFLAGS = $(EXTRA_LIBPCRE16_LDFLAGS)
+libpcre16_la_LDFLAGS = -no-undefined $(EXTRA_LIBPCRE16_LDFLAGS)
 endif # WITH_PCRE16
 
 CLEANFILES += pcre_chartables.c
@@ -292,9 +296,10 @@ endif # WITH_JIT
 ## A version of the main pcre library that has a posix re API.
 if WITH_PCRE8
 lib_LTLIBRARIES += libpcreposix.la
+libpcreposix_la_CFLAGS = $(CFLAG_VISIBILITY)
 libpcreposix_la_SOURCES = \
   pcreposix.c
-libpcreposix_la_LDFLAGS = $(EXTRA_LIBPCREPOSIX_LDFLAGS)
+libpcreposix_la_LDFLAGS = -no-undefined $(EXTRA_LIBPCREPOSIX_LDFLAGS)
 libpcreposix_la_LIBADD = libpcre.la
 endif # WITH_PCRE8
 
@@ -302,12 +307,13 @@ endif # WITH_PCRE8
 if WITH_PCRE_CPP
 
 lib_LTLIBRARIES += libpcrecpp.la
+libpcrecpp_la_CXXFLAGS = $(CFLAG_VISIBILITY)
 libpcrecpp_la_SOURCES = \
   pcrecpp_internal.h \
   pcrecpp.cc \
   pcre_scanner.cc \
   pcre_stringpiece.cc
-libpcrecpp_la_LDFLAGS = $(EXTRA_LIBPCRECPP_LDFLAGS)
+libpcrecpp_la_LDFLAGS = -no-undefined $(EXTRA_LIBPCRECPP_LDFLAGS)
 libpcrecpp_la_LIBADD = libpcre.la
 
 TESTS += pcrecpp_unittest
@@ -351,6 +357,7 @@ if WITH_PCRE8
 TESTS += RunGrepTest
 dist_noinst_SCRIPTS += RunGrepTest
 bin_PROGRAMS += pcregrep
+pcregrep_CFLAGS = -fwhole-program
 pcregrep_SOURCES = pcregrep.c
 pcregrep_LDADD = $(LIBZ) $(LIBBZ2)
 pcregrep_LDADD += libpcre.la libpcreposix.la