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Mail Archives: djgpp/2015/06/05/04:28:52

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<201506050742 DOT t557ggR8019445 AT envy DOT delorie DOT com>
Date: Fri, 5 Jun 2015 11:28:35 +0300
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Subject: Re: dxe3gen patch
From: "Ozkan Sezer (sezeroz AT gmail DOT com)" <djgpp AT delorie DOT com>
To: djgpp AT delorie DOT com
Cc: DJ Delorie <dj AT delorie DOT com>
Reply-To: djgpp AT delorie DOT com
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--001a114260f80672360517c11481
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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

--
O.S.

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