diff options
Diffstat (limited to 'pm_config.in.h')
| -rw-r--r-- | pm_config.in.h | 167 |
1 files changed, 101 insertions, 66 deletions
diff --git a/pm_config.in.h b/pm_config.in.h index 51a7b966..fe8b8008 100644 --- a/pm_config.in.h +++ b/pm_config.in.h @@ -15,7 +15,7 @@ **************************************************************************/ -#if defined(USG) || defined(SVR4) || defined(VMS) || defined(__SVR4) +#if defined(USG) || defined(SVR4) || defined(__SVR4) #define SYSV #endif #if !( defined(BSD) || defined(SYSV) || defined(MSDOS) || defined(__amigaos__)) @@ -54,45 +54,29 @@ #endif -/* CONFIGURE: If you have an X11-style rgb color names file, define its -** path here. This is used by PPM to parse color names into rgb values. -** If you don't have such a file, comment this out and use the alternative -** hex and decimal forms to specify colors (see ppm/pgmtoppm.1 for details). */ - -#define RGB_DB_PATH \ -"/usr/share/netpbm/rgb.txt:" \ -"/usr/lib/X11/rgb.txt:" \ -"/usr/share/X11/rgb.txt:" \ -"/usr/X11R6/lib/X11/rgb.txt" - /* CONFIGURE: This is the name of an environment variable that tells ** where the color names database is. If the environment variable isn't -** set, Netpbm tries the hardcoded defaults set above. +** set, Netpbm tries the hardcoded defaults per macro 'RGB_DB_PATH' +** (see below). */ #define RGBENV "RGBDEF" /* name of env-var */ +/* CONFIGURE: There should be an environment variable telling where the color +** names database (color dictionary) is for Netpbm to use, e.g. to determine +** what colord name "Salmon" is. The name of that environment variable is +** above. But as some people prefer hardcoded file paths to environment +** variables, if such environment variable is not set, Netpbm looks for the +** first existing file in the list which is the value of 'RGB_DB_PATH'. And +** if none of those exist (including if the list is empty), Netpbm simply +** doesn't understand any color names. Note that Netpbm comes with a color +** database (lib/rgb.txt in the source tree), but you might choose to have +** Netpbm use a different one. See the documentation of ppm_parsecolor() +** for the format of the color database file. +*/ + #if (defined(SYSV) || defined(__amigaos__)) #include <string.h> -/* Before Netpbm 9.1, rand and srand were macros for random and - srandom here. This caused a failure on a SunOS 5.6 system, which - is SYSV, but has both rand and random declared (with different - return types). The macro caused the prototype for random to be a - second prototype for rand. Before 9.1, Netpbm programs called - random() and on a SVID system, that was really a call to rand(). - We assume all modern systems have rand() itself, so now Netpbm - always calls rand() and if we find a platform that doesn't have - rand(), we will add something here for that platform. -Bryan 00.04.26 -#define random rand -#define srandom(s) srand(s) -extern void srand(); -extern int rand(); -*/ -/* Before Netpbm 9.15, there were macro definitions of index() and - rindex() here, but there are no longer any invocations of those - functions in Netpbm, except in the VMS-only code, so there's no - reason for them. -*/ #ifndef __SASC #ifndef _DCC /* Amiga DICE Compiler */ @@ -115,15 +99,22 @@ extern int rand(); #ifdef BSD #include <stdlib.h> #endif -#if (defined(SYSV) && !defined(VMS)) +#if defined(SYSV) #include <malloc.h> #endif -/* CONFIGURE: If your system has the setmode() function, set HAVE_SETMODE. -** If you do, and also the O_BINARY file mode, pm_init() will set the mode -** of stdin and stdout to binary for all Netpbm programs. -** You need this with Cygwin (Windows). -*/ +/* MSVCRT means we're using the Microsoft Visual C++ runtime library. + + _WIN32, set by the compiler, apparently means the same thing; we see it set + in compiles using the Microsoft Visual C++ development environment and also + with Mingw, which is the Windows version of the GNU compiler (which brings + with it a runtime library which wraps around the Microsoft one). We don't + see it set in Cygwin compiles, which use GNU libraries instead of the + Microsoft one. + + There is also _MSC_VER, which is set by MSVC to the version number of the + MSVC runtime library and __MINGW32__. + */ #ifdef _WIN32 #define MSVCRT 1 @@ -131,18 +122,42 @@ extern int rand(); #define MSVCRT 0 #endif +/* WIN32 is a macro that some older compilers predefine (compilers aren't + supposed to because it doesn't start with an underscore, hence the change. + Many build systems (project files, etc.) set WIN32 explicitly for + backward compatibility. Netpbm doesn't use it. +*/ + +/* CONFIGURE: If your system has the setmode() function, set HAVE_SETMODE. +** If you do, and also the O_BINARY file mode, pm_init() will set the mode +** of stdin and stdout to binary for all Netpbm programs. +** You need this with Cygwin (Windows). +*/ #if MSVCRT || defined(__CYGWIN__) || defined(DJGPP) #define HAVE_SETMODE #endif -/* #define HAVE_SETMODE */ +#if MSVCRT || defined(__CYGWIN__) || defined(DJGPP) +#define HAVE_IO_H 1 +#else +#define HAVE_IO_H 0 +#endif -#if (defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__APPLE__)) +#if (defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__APPLE__)) || defined(__NetBSD__) #define HAVE_VASPRINTF 1 #else #define HAVE_VASPRINTF 0 #endif +/* On Windows, unlinking a file is deleting it, and you can't delete an open + file, so unlink of an open file fails. The errno is (incorrectly) EACCES. +*/ +#if MSVCRT || defined(__CYGWIN__) || defined(DJGPP) + #define CAN_UNLINK_OPEN 0 +#else + #define CAN_UNLINK_OPEN 1 +#endif + #ifdef __amigaos__ #include <clib/exec_protos.h> #define getpid() ((pid_t)FindTask(NULL)) @@ -150,7 +165,7 @@ extern int rand(); #ifdef DJGPP #define lstat stat -#endif /* DJGPP */ +#endif /* CONFIGURE: Netpbm uses __inline__ to declare functions that should be compiled as inline code. GNU C recognizes the __inline__ keyword. @@ -185,38 +200,25 @@ extern int rand(); #endif #endif -/* CONFIGURE: GNUC extensions are used in performance critical places +/* CONFIGURE: GNU Compiler extensions are used in performance critical places when available. Test whether they exist. - Turn off by defining NO_GCC_BUILTINS. + Prevent the build from exploiting these extensions by defining + NO_GCC_UNIQUE. - Note that though these influence the code produced, the compiler - setting ultimately decides what operands are used. If you - want a generic build, check the manual and adjust CFLAGS in - config.mk accordingly. - - For example, if you want binaries that run on all Intel x86-32 - family CPUs back to 80386, adding "-march=i386" to CFLAGS in - config.mk is much better than setting NO_GCC_BUILTINS to 1. - If you want to be extra sure use: - "-march=i386 -mno-mmx -mno-sse -DNO_GCC_BUILTINS" + Before Netpbm 10.65 (December 2013), Netpbm used GCC compiler extensions + to generate SSE code in Pamflip. Starting in 10.65, Netpbm instead uses + the more standard operators defined in <emmtrins.h>. To prevent Netpbm + from explicitly using any SSE instructions, set WANT_SSE to N in + config.mk. */ -#if defined(__GNUC__) && !defined(NO_GCC_BUILTINS) +#if defined(__GNUC__) && !defined(NO_GCC_UNIQUE) #define GCCVERSION __GNUC__*100 + __GNUC_MINOR__ #else #define GCCVERSION 0 #endif -#ifndef HAVE_GCC_MMXSSE -#if GCCVERSION >=301 && defined(__MMX__) && defined(__SSE__) - #define HAVE_GCC_MMXSSE 1 - /* Use GCC builtins to directly access MMX/SSE features */ -#else - #define HAVE_GCC_MMXSSE 0 -#endif -#endif - #ifndef HAVE_GCC_BITCOUNT #if GCCVERSION >=304 #define HAVE_GCC_BITCOUNT 1 @@ -228,10 +230,9 @@ extern int rand(); #endif #ifndef HAVE_GCC_BSWAP -#if GCCVERSION >=403 +#if GCCVERSION >=403 || defined(__clang__) #define HAVE_GCC_BSWAP 1 /* Use __builtin_bswap32(), __builtin_bswap64() for endian conversion. - Available from GCC v 4.3 onward. NOTE: On intel CPUs this may produce the bswap operand which is not available on 80386. */ #else @@ -239,6 +240,35 @@ extern int rand(); #endif #endif +#ifndef HAVE_WORKING_SSE2 +#if defined(__SSE2__) && ( GCCVERSION >=402 || defined(__clang__) ) + #define HAVE_WORKING_SSE2 1 + /* We can use SSE2 builtin functions to exploit SSE2 instructions. GCC + version 4.2 or newer is required; older GCC ostensibly has these SSE2 + builtins, but the compiler aborts with an error. Note that __SSE2__ + means not only that the compiler has the capability, but that the user + has not disabled it via compiler options. + */ +#else + #define HAVE_WORKING_SSE2 0 +#endif +#endif + +/* UNALIGNED_OK means it's OK to do unaligned memory access, e.g. + loading an 8-byte word from an address that is not a multiple of 8. + On some systems, such an access causes a trap and a signal. + + This determination is conservative - There may be cases where unaligned + access is OK and we say here it isn't. + + We know unaligned access is _not_ OK on at least SPARC and some ARM. +*/ + +#if defined(__x86_64__) | defined(__i486__) | defined(__vax__) +# define UNALIGNED_OK 1 +#else +# define UNALIGNED_OK 0 +#endif /* CONFIGURE: Some systems seem to need more than standard program linkage @@ -300,9 +330,14 @@ typedef long int pm_filepos; typedef int qsort_comparison_fn(const void *, const void *); /* A compare function to pass to <stdlib.h>'s qsort() */ -#if defined(WIN32) && !defined(__CYGWIN__) +#if MSVCRT #define pm_mkdir(dir, perm) _mkdir(dir) #else #define pm_mkdir(dir, perm) mkdir(dir, perm) #endif +#if MSVCRT + #define pm_pipe _pipe +#else + #define pm_pipe pipe +#endif |