Add an include to remove any C Preprocessor symbol libcdio's config.h creates. Programs using

libcdio can do this:

// for cdio:

// for your program

include/cdio/Makefile.am

@@ -35,6 +35,7 @@ libcdioinclude_HEADERS = \
 	bytesex_asm.h \
 	cdio.h \
 	cdio_config.h \
+	cdio_unconfig.h \
 	cd_types.h \
 	device.h \
 	disc.h \

include/cdio/cdio_unconfig.h

@@ -0,0 +1,116 @@
+/* You can include this to remove any C preprocessor symbols created in cdio_config.h.
+   For example, if your project has your own config.h which sets symbols do this:
+
+   // for cdio:
+   #include <cdio.h>
+   #include <cdio_unconfig.h>
+   // for your program
+   #include <config.h>
+*/
+#undef EMPTY_ARRAY_SIZE 
+#undef HAVE_BZERO
+#undef HAVE_CDDB
+#undef HAVE_CHDIR
+#undef HAVE_CURSES_H
+#undef HAVE_DAYLIGHT
+#undef HAVE_DLFCN_H
+#undef HAVE_DRAND48
+#undef HAVE_ERRNO_H
+#undef HAVE_FCNTL_H
+#undef HAVE_FTRUNCATE
+#undef HAVE_GETEUID
+#undef HAVE_GETGID
+#undef HAVE_GETOPT_H
+#undef HAVE_GETPWUID
+#undef HAVE_GETTIMEOFDAY
+#undef HAVE_GETUID
+#undef HAVE_GLOB_H
+#undef HAVE_GMTIME_R
+#undef HAVE_ICONV
+#undef HAVE_INTTYPES_H
+#undef HAVE_ISOC99_PRAGMA
+#undef HAVE_JOLIET
+#undef HAVE_KEYPAD
+#undef HAVE_LANGINFO_CODESET
+#undef HAVE_LIMITS_H
+#undef HAVE_LINUX_CDROM
+#undef HAVE_LINUX_CDROM_H
+#undef HAVE_LINUX_MAJOR_H
+#undef HAVE_LINUX_VERSION_H
+#undef HAVE_LOCALTIME_R
+#undef HAVE_LSTAT
+#undef HAVE_MEMCPY
+#undef HAVE_MEMORY_H
+#undef HAVE_MEMSET
+#undef HAVE_NCURSES_H
+#undef HAVE_PWD_H
+#undef HAVE_RAND
+#undef HAVE_READLINK
+#undef HAVE_REALPATH
+#undef HAVE_ROCK
+#undef HAVE_SETEGID
+#undef HAVE_SETENV
+#undef HAVE_SETEUID
+#undef HAVE_SLEEP
+#undef HAVE_SNPRINTF
+#undef HAVE_SOLARIS_CDROM
+#undef HAVE_STDARG_H
+#undef HAVE_STDBOOL_H
+#undef HAVE_STDINT_H
+#undef HAVE_STDIO_H
+#undef HAVE_STDLIB_H
+#undef HAVE_STRINGS_H
+#undef HAVE_STRING_H
+#undef HAVE_STRUCT_TIMESPEC
+#undef HAVE_SYS_CDIO_H
+#undef HAVE_SYS_PARAM_H
+#undef HAVE_SYS_STAT_H
+#undef HAVE_SYS_TIMEB_H
+#undef HAVE_SYS_TIME_H
+#undef HAVE_SYS_TYPES_H
+#undef HAVE_SYS_UTSNAME_H
+#undef HAVE_S_ISLNK
+#undef HAVE_S_ISSOCK
+#undef HAVE_TIMEGM
+#undef HAVE_TIMEZONE_VAR
+#undef HAVE_TM_GMTOFF
+#undef HAVE_TZNAME
+#undef HAVE_TZSET
+#undef HAVE_UNISTD_H
+#undef HAVE_UNSETENV
+#undef HAVE_USLEEP
+#undef HAVE_VCDINFO
+#undef HAVE_VSNPRINTF
+#undef HAVE_WIN32_CDROM
+#undef HAVE_WINDOWS_H
+#undef ICONV_CONST 
+#undef LIBCDIO_CONFIG_H
+#undef LIBCDIO_SOURCE_PATH
+#undef LT_OBJDIR
+#undef MINGW32
+#undef NEED_TIMEZONEVAR
+#undef NO_MINUS_C_MINUS_O
+#undef PACKAGE
+#undef PACKAGE_BUGREPORT
+#undef PACKAGE_NAME 
+#undef PACKAGE_STRING
+#undef PACKAGE_TARNAME
+#undef PACKAGE_URL
+#undef PACKAGE_VERSION
+#undef STDC_HEADERS
+#undef _ALL_SOURCE
+#undef _GNU_SOURCE
+#undef _POSIX_PTHREAD_SEMANTICS
+#undef _TANDEM_SOURCE
+#undef __EXTENSIONS__
+#undef VERSION 
+#undef AC_APPLE_UNIVERSAL_BUILD
+#undef __BIG_ENDIAN__
+#undef WORDS_BIGENDIAN
+#undef _FILE_OFFSET_BITS
+#undef _LARGEFILE_SOURCE
+#undef _LARGE_FILES
+#undef _MINIX
+#undef _POSIX_1_SOURCE
+#undef _POSIX_SOURCE
+#undef const

test/.gitignore

@@ -6,12 +6,12 @@
 /.libs
 /Makefile
 /Makefile.in
-/cdda.bin
 /cdda-1.raw
 /cdda-2.raw
 /cdda-good.raw
 /cdda-jitter.raw
 /cdda-underrun.raw
+/cdda.bin
 /check_common_fn
 /check_cue.sh
 /check_iso.sh
@@ -40,3 +40,4 @@
 /testpregap.c
 /testsolaris
 /testtoc
+/testunconfig

test/Makefile.am

@@ -30,7 +30,7 @@ endif
 
 hack = check_sizeof testassert testgetdevices testischar \
        testisocd testisocd2 testiso9660 test_lib_driver_util \
-       $(testparanoia) testpregap 
+       $(testparanoia) testpregap testunconfig
 
 EXTRA_PROGRAMS = testdefault 
 DATA_DIR       = @abs_top_srcdir@/test/data
@@ -45,8 +45,10 @@ testgetdevices_LDADD  = $(LIBCDIO_LIBS) $(LTLIBICONV)
 testischar_LDADD      = $(LIBISO9660_LIBS) $(LIBCDIO_LIBS) $(LTLIBICONV)
 testiso9660_LDADD     = $(LIBISO9660_LIBS) $(LIBCDIO_LIBS) $(LTLIBICONV)
 
-testisocd_LDADD     = $(LIBISO9660_LIBS) $(LIBCDIO_LIBS) $(LTLIBICONV)
+testisocd_LDADD       = $(LIBISO9660_LIBS) $(LIBCDIO_LIBS) $(LTLIBICONV)
-testisocd2_LDADD    = $(LIBISO9660_LIBS) $(LIBCDIO_LIBS) $(LTLIBICONV)
+testisocd2_LDADD      = $(LIBISO9660_LIBS) $(LIBCDIO_LIBS) $(LTLIBICONV)
+
+testunconfig_LDADD    = $(LIBCDIO_LIBS) $(LTLIBICONV)
 
 test_lib_driver_util_LDADD    = $(LIBCDIO_LIBS) $(LTLIBICONV)
 test_lib_driver_util_CFLAGS   = -DDATA_DIR=\"$(DATA_DIR)\"

test/testunconfig.c

@@ -0,0 +1,46 @@
+/*
+  Copyright (C) 2011 Rocky Bernstein <rocky@gnu.org>
+  
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* 
+   Regression test config.h and cdio_unconfig
+   and cdio_free_device_list()
+*/
+#include "config.h"
+#define __CDIO_CONFIG_H__ 1
+
+#include "cdio/cdio_config.h" /* should do nothing */
+#include "cdio/cdio.h"
+
+#include <stdio.h>
+
+int
+main(int argc, const char *argv[])
+{
+
+#ifndef PACKAGE
+    printf("config.h should have set PACKAGE preprocessor symbol\n");
+#endif
+
+#include "cdio/cdio_unconfig.h"
+
+#ifdef PACKAGE
+    printf("cdio_unconfig should have removed PACKAGE preprocessor symbol\n");
+    return 2;
+#else 
+    return 0;
+#endif
+}