Mail Archives: djgpp/2015/06/05/04:48:17
--001a113f8e6ab4c8a50517c159fb
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On 6/5/15, Ozkan Sezer <sezeroz AT gmail DOT com> wrote:
> On 6/5/15, DJ Delorie <dj AT delorie DOT com> wrote:
>>
>> I'm not opposed to environment variables, but they're a bit messy in a
>> unix environment (vs djgpp where we can ship djgpp.env with them ;).
>>
>
> We can provide a sample dxe3gen.sh for it maybe? (more below)
>
>> If dxegen is built as a native djgpp program, it should be using the
>> native djgpp tools (gcc, ld, etc). Yes?
>>
>
> Of course,
>
>> If dxegen is cross built, it should note the target prefix (the
>> i586-pc-djgpp- part) and change the defaults for the tools to have
>> that prefix (i586-pc-djgpp-gcc, etc). We try to do this with the
>> -DDXE_LD option.
>>
>> If we do both of these correctly, most users shouldn't need to
>> override the defaults at all, and then it's not as big a deal that
>> they're controlled with environment variables (or cleaner but harder
>> command line options).
>>
>> I don't think it's right for us to *rely* on environment variables to
>> provide correct *default* program names, though.
>>
>
> How about the following patch, which extends the -DDXE_?? options
> at cross-build time and also adds the DXE_?? environment stuff?
> Or, do you prefer something without any environment vars?
>
>>
>> Also, your mailer is wrapping lines, which corrupted the patch in a
>> way that really confused me at first:
>>
>> /* Prepare the command line for ld */
>> new_argv = (const char **)malloc((argc - 1 + NUMBER_OF_LINKER_ARGS
>> + NUMBER_OF_ADDITIONAL_LOADED_LIBS + 2 + 1) * sizeof(char *));
>> + process_env();
>> process_args(argc, argv, new_argv);
>>
>> Note the column for the wrapped '+' :-)
>
> Yeah, gmail is to blame. Attaching the patch too this time.
>
> Index: src/dxe/makefile
> ===================================================================
> RCS file: /cvs/djgpp/djgpp/src/dxe/makefile,v
> retrieving revision 1.8
> diff -u -r1.8 makefile
> --- src/dxe/makefile 21 Jul 2013 12:25:58 -0000 1.8
> +++ src/dxe/makefile 5 Jun 2015 08:18:18 -0000
> @@ -33,7 +33,7 @@
> $(EXE)
>
> $(HOSTBIN)/dxegen.exe : dxe3gen.c init1.h init2.h init3.h init4.h
> init5.h fini1.h fini2.h fini3.h fini4.h fini5.h
> - $(GCC) -DDXE_LD=\"$(CROSS_LD)\" dxe3gen.c -o $@
> + $(GCC) -DDXE_LD=\"$(CROSS_LD)\" -DDXE_CC=\"$(CROSS_GCC)\"
> -DDXE_AR=\"$(CROSS_AR)\" -DDXE_AS=\"$(CROSS_AS)\" dxe3gen.c -o $@
>
> clean ::
> @-$(MISC) rm *.o *.h $(HOSTBIN)/dxegen.exe
> Index: src/dxe/dxe3gen.c
> ===================================================================
> RCS file: /cvs/djgpp/djgpp/src/dxe/dxe3gen.c,v
> retrieving revision 1.20
> diff -u -r1.20 dxe3gen.c
> --- src/dxe/dxe3gen.c 23 May 2015 08:20:05 -0000 1.20
> +++ src/dxe/dxe3gen.c 5 Jun 2015 08:18:18 -0000
> @@ -165,10 +165,23 @@
> #endif /* !DEBUG_SUPPORT_PRINT_RELOCATION_DIRECTIVES */
>
>
> +/* Cross compile tool names */
> +#ifndef DXE_CC
> +#define DXE_CC "gcc"
> +#endif
> +#ifndef DXE_AS
> +#define DXE_AS "as"
> +#endif
> +#ifndef DXE_AR
> +#define DXE_AR "ar"
> +#endif
> #ifndef DXE_LD
> -/* Cross compile ld name/location */
> #define DXE_LD "ld"
> #endif
> +#ifndef DXE_SC
> +#define DXE_SC "dxe.ld"
> +#endif
> +
> #ifdef _POSIX_SOURCE
> /* Linux violates POSIX.1 and defines this, but it shouldn't.. */
> #undef _POSIX_SOURCE
> @@ -297,6 +310,15 @@
> };
>
>
> +static char *libdir;
> +/* build tools */
> +static char *dxe_cc; /* default: "gcc" */
> +static char *dxe_as; /* default: "as" */
> +static char *dxe_ar; /* default: "ar" */
> +static char *dxe_ld; /* default: "ld" */
> +/* linker script */
> +static char *dxe_sc; /* default: "dxe.ld" */
> +
>
> /* Desc: replaces backslash with slash in a path
> *
> @@ -410,6 +432,45 @@
>
>
>
> +/* Desc: process the DXE_?? environment variables
> + */
> +static void process_env(void)
> +{
> + const char *e;
> +
> + if ((e = getenv("DXE_CC")) != NULL)
> + dxe_cc = strdup(e);
> + else dxe_cc = strdup(DXE_CC);
> +
> + if ((e = getenv("DXE_AS")) != NULL)
> + dxe_as = strdup(e);
> + else dxe_as = strdup(DXE_AS);
> +
> + if ((e = getenv("DXE_AR")) != NULL)
> + dxe_ar = strdup(e);
> + else dxe_ar = strdup(DXE_AR);
> +
> + if ((e = getenv("DXE_LD")) != NULL)
> + dxe_ld = strdup(e);
> + else dxe_ld = strdup(DXE_LD);
> +
> + if ((e = getenv("DXE_SC")) != NULL)
> + dxe_sc = strdup(e);
> + else dxe_sc = strdup(DXE_SC);
> +
> + if ((e = getenv("DXE_LD_LIBRARY_PATH")) != NULL)
> + libdir = strdup(e);
> + else if ((e = getenv("DJDIR")) != NULL) {
> + size_t sz = strlen(e) + 5U;
> + libdir = malloc(sz);
> + strcpy(libdir, e);
> + strcat(libdir, "/lib");
> + canonicalize_path(libdir);
> + }
> + else libdir = NULL;
> +}
> +
> +
> /* Desc: process command line args
> *
> * In : no of arguments, argument list, ptr to store linker args
> @@ -419,30 +480,15 @@
> */
> static void process_args(int argc, char *argv[], const char *new_argv[])
> {
> - static char libdir[FILENAME_MAX];
> - char *p;
> int i, new_argc = NUMBER_OF_LINKER_ARGS;
>
> - p = getenv("DXE_LD_LIBRARY_PATH");
> - if (p)
> - strcpy(libdir, p);
> - else
> + if (!libdir)
> {
> - p = getenv("DJDIR");
> - if (p)
> - {
> - strcpy(libdir, p);
> - strcat(libdir, "/lib");
> - canonicalize_path(libdir);
> - }
> - else
> - {
> fprintf(stderr, "Error: neither DXE_LD_LIBRARY_PATH nor DJDIR
> are set in environment\n");
> exit(1);
> - }
> }
>
> - new_argv[0] = DXE_LD;
> + new_argv[0] = dxe_ld;
> new_argv[1] = "-X";
> new_argv[2] = "-S";
> new_argv[3] = "-r";
> @@ -451,7 +497,7 @@
> new_argv[6] = "-L";
> new_argv[7] = libdir;
> new_argv[8] = "-T";
> - new_argv[9] = "dxe.ld";
> + new_argv[9] = dxe_sc;
>
> if (!strcmp(base_name(argv[0]), "dxegen"))
> /* invoked as `dxegen' */
> @@ -736,7 +782,7 @@
> if ((rv = my_spawn(argv)) != 0)
> {
> if (rv == -1)
> - perror(DXE_LD);
> + perror("ld");
> exit(rv);
> }
>
> @@ -861,7 +907,7 @@
> if (rv)
> {
> if (rv == -1)
> - perror(DXE_LD);
> + perror("ld");
> exit(rv);
> }
>
> @@ -1336,7 +1382,8 @@
> }
>
> /* Pre-compile the resolver's output. */
> - rv = system("gcc -o "TEMP_S_FILE" -O2 -S "TEMP_BASE".c");
> + sprintf(cmdbuf, "%s -o %s -O2 -S %s.c", dxe_cc, TEMP_S_FILE,
> TEMP_BASE);
> + rv = system(cmdbuf);
> remove(TEMP_BASE".c");
> if (rv != 0)
> {
> @@ -1420,7 +1467,8 @@
> atexit(exit_cleanup);
>
> /* Allright, now run the assembler on the resulting file */
> - if ((rv = system("as -o "TEMP_O_FILE" "TEMP_S_FILE)) != 0)
> + sprintf(cmdbuf, "%s -o %s %s", dxe_as, TEMP_O_FILE, TEMP_S_FILE);
> + if ((rv = system(cmdbuf)) != 0)
> {
> if (rv == -1)
> perror("as");
> @@ -1428,7 +1476,7 @@
> }
>
> /* Okey-dokey, let's stuff the object file into the archive */
> - sprintf(cmdbuf, "ar crs %s "TEMP_O_FILE, opt.implib);
> + sprintf(cmdbuf, "%s crs %s "TEMP_O_FILE, dxe_ar, opt.implib);
> if ((rv = system(cmdbuf)) != 0)
> {
> if (rv == -1)
> @@ -1512,6 +1560,7 @@
> progname = argv[0];
> /* Prepare the command line for ld */
> new_argv = (const char **)malloc((argc - 1 + NUMBER_OF_LINKER_ARGS
> + NUMBER_OF_ADDITIONAL_LOADED_LIBS + 2 + 1) * sizeof(char *));
> + process_env();
> process_args(argc, argv, new_argv);
>
> if (opt.showdep || opt.showexp || opt.showunres)
> Index: src/makefile.def
> ===================================================================
> RCS file: /cvs/djgpp/djgpp/src/makefile.def,v
> retrieving revision 1.5
> diff -u -r1.5 makefile.def
> --- src/makefile.def 6 Feb 2003 10:40:24 -0000 1.5
> +++ src/makefile.def 5 Jun 2015 08:18:17 -0000
> @@ -26,6 +26,7 @@
> # For building distributed (djgpp) libraries and programs
> CROSS_GCC = gcc
> CROSS_AR = ar
> +CROSS_AS = as
> CROSS_LD = ld
> CROSS_STRIP = strip
> CROSS_BISON = bison
> @@ -33,6 +34,7 @@
> # For building native programs (hostbin/*); assumes GNU versions
> GCC = gcc -g
> AR = ar
> +AS = as
> LD = ld
> STRIP = strip
> BISON = bison
> @@ -47,6 +49,7 @@
>
> CROSS_GCC = i586-pc-msdosdjgpp-gcc -pipe
> CROSS_AR = i586-pc-msdosdjgpp-ar
> +CROSS_AS = i586-pc-msdosdjgpp-as
> CROSS_LD = i586-pc-msdosdjgpp-ld
> CROSS_STRIP = i586-pc-msdosdjgpp-strip
> CROSS_BISON = bison
> @@ -56,6 +59,7 @@
>
> GCC = gcc -g -O2
> AR = ar
> +AS = as
> LD = ld
> STRIP = strip
> BISON = bison
>
Sigh, the attached fixed one does actually compile.
Comments?
--
O.S.
--001a113f8e6ab4c8a50517c159fb
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