Re: [Tinycc-devel] A Patch for -dumpmachine Option

[Christian Jullien]

I don't know if your patch will reach mob or not but, if it does, IMHO, to be 
useful, the output string should match what gcc/clang currently reports.

For example:

RPi 32bit reports:
$ gcc -dumpmachine
arm-linux-gnueabihf

RPi 64bit reports:
$ gcc -dumpmachine
aarch64-linux-gnu

Windows reports:
gcc -dumpmachine
x86_64-pc-cygwin

or

clang -dumpmachine
x86_64-pc-windows-msvc

macOS:
jullien@mobley:~ $ clang -dumpmachine
arm64-apple-darwin21.4.0
jullien@mobley:~ $ clang -arch x86_64 -dumpmachine
x86_64-apple-darwin21.4.0

etc...

-----Original Message-----
From: Tinycc-devel [mailto:tinycc-devel-bounces+eligis=orange.fr@nongnu.org] On 
Behalf Of Ziyao
Sent: Thursday, March 24, 2022 11:36
To: Tinycc-devel@nongnu.org
Subject: [Tinycc-devel] A Patch for -dumpmachine Option

Hi list,

I have made a small patch which adds option "-dumpmachine" support to
TinyCC.This option is widely supported by both gcc and clang.Some configure
scripts detect the platform information by passing this option to the
C compiler,such as musl libc.

And by the way,what is the proper way to contribute? Just send patches to
this maillist or what?Should I send a normal patch or formatted patch?
Thanks for answering.

(To avoid messing the plaintext mail readers up,I add my patch to the bottom
of this mail.)

Cheers,
Ziyao

--------------------------------------

diff --git a/libtcc.c b/libtcc.c
index b6dbb01..6e5cf17 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -1456,6 +1456,7 @@ enum {
     TCC_OPTION_g,
     TCC_OPTION_c,
     TCC_OPTION_dumpversion,
+    TCC_OPTION_DUMPMACHINE,
     TCC_OPTION_d,
     TCC_OPTION_static,
     TCC_OPTION_std,
@@ -1488,7 +1489,7 @@ enum {
     TCC_OPTION_MMD,
     TCC_OPTION_x,
     TCC_OPTION_ar,
-    TCC_OPTION_impdef,
+    TCC_OPTION_impdef
 };
 
 #define TCC_OPTION_HAS_ARG 0x0001
@@ -1518,6 +1519,7 @@ static const TCCOption tcc_options[] = {
     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
     { "c", TCC_OPTION_c, 0 },
     { "dumpversion", TCC_OPTION_dumpversion, 0},
+    { "dumpmachine", TCC_OPTION_DUMPMACHINE , 0 },
     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
     { "static", TCC_OPTION_static, 0 },
     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
@@ -1952,6 +1954,8 @@ reparse:
             printf ("%s\n", TCC_VERSION);
             exit(0);
             break;
+        case TCC_OPTION_DUMPMACHINE:
+            return OPT_DUMPMACHINE;
         case TCC_OPTION_x:
             x = 0;
             if (*optarg == 'c')
diff --git a/tcc.c b/tcc.c
index 42a251b..ed9c143 100644
--- a/tcc.c
+++ b/tcc.c
@@ -95,6 +95,7 @@ static const char help2[] =
     "  -isystem dir                  add 'dir' to system include path\n"
     "  -static                       link to static libraries (not 
recommended)\n"
     "  -dumpversion                  print version\n"
+    "  -dumpmachine                  print platform information\n"
     "  -print-search-dirs            print search paths\n"
     "  -dt                           with -run/-E: auto-define 'test_...' 
macros\n"
     "Ignored options:\n"
@@ -289,6 +290,47 @@ redo:
                 return 0;
             ++opt;
         }
+
+        if (opt == OPT_DUMPMACHINE) {
+            fputs(
+#ifdef TCC_TARGET_I386
+        "i386"
+#elif defined TCC_TARGET_X86_64
+        "x86_64"
+#elif defined TCC_TARGET_C67
+        "c67"
+#elif defined TCC_TARGET_ARM
+        "arm"
+# ifdef TCC_ARM_EABI
+        " eabi"
+#  ifdef TCC_ARM_HARDFLOAT
+        "hf"
+#  endif
+# endif
+#elif defined TCC_TARGET_ARM64
+        "aarch64"
+#elif defined TCC_TARGET_RISCV64
+        "riscv64"
+#endif
+       "-"
+#ifdef TCC_TARGET_PE
+        "windows"
+#elif defined(TCC_TARGET_MACHO)
+        "darwin"
+#elif TARGETOS_FreeBSD || TARGETOS_FreeBSD_kernel
+        "freebsd"
+#elif TARGETOS_OpenBSD
+        "openbsd"
+#elif TARGETOS_NetBSD
+        "netbsd"
+#else
+        "linux"
+#endif
+                "-tcc\n",stdout);
+            return 0;
+
+        }
+
         if (opt == OPT_HELP2) {
             fputs(help2, stdout);
             return 0;
diff --git a/tcc.h b/tcc.h
index 9724848..3812241 100644
--- a/tcc.h
+++ b/tcc.h
@@ -1279,6 +1279,7 @@ ST_FUNC char *tcc_load_text(int fd);
 #define OPT_PRINT_DIRS 4
 #define OPT_AR 5
 #define OPT_IMPDEF 6
+#define OPT_DUMPMACHINE 7
 #define OPT_M32 32
 #define OPT_M64 64


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