From d5c61681198527d70bc95f8ed10f19e881ac51b3 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Wed, 24 Aug 2022 07:04:02 +0200
Subject: arch stuff

---
 .gitignore             |  1 +
 bootstrap/bootstrap.sh |  2 ++
 src/cffc.hff           |  2 ++
 src/libc.hff           |  2 ++
 src/main.cff           |  8 +++++++-
 src/targ.cff           | 14 ++++++++++++++
 6 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index eb3e33c..7f31903 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ compile_commands.json
 a.out
 .gdb_history
 .cache/
+src/host-target-triple.cff
diff --git a/bootstrap/bootstrap.sh b/bootstrap/bootstrap.sh
index f221ce2..1d682dc 100755
--- a/bootstrap/bootstrap.sh
+++ b/bootstrap/bootstrap.sh
@@ -16,6 +16,8 @@ export CFLAGS="-Wno-builtin-declaration-mismatch -Wno-discarded-qualifiers -g"
 
 set -euo pipefail
 
+echo "extern static host_target_triple const *const u8 = \"`clang -print-target-triple`\";" > ../src/host-target-triple.cff
+
 mkdir -p obj1/
 for f in $(find ../src/ -name '*.cff'); do
    out=obj1/$(basename "$f").o
diff --git a/src/cffc.hff b/src/cffc.hff
index d327766..21418b9 100644
--- a/src/cffc.hff
+++ b/src/cffc.hff
@@ -382,7 +382,9 @@ extern fn fatal(*Parser, Loc, fmt *const u8, ...) void;
 
 // targ.cff
 extern static g_targ Targ;
+extern static host_target_triple const *const u8;
 extern fn targ_ini(name *const u8) bool;
+extern fn triple2targ(triple *const u8) *const u8;
 
 // type.cff
 extern static ty_void     *const Type,
diff --git a/src/libc.hff b/src/libc.hff
index a6c326c..0744d35 100644
--- a/src/libc.hff
+++ b/src/libc.hff
@@ -29,11 +29,13 @@ def PATH_MAX = 4096;
 // string.h
 extern fn strlen(s *const u8) usize;
 extern fn strcmp(a *const u8, b *const u8) int;
+extern fn strncmp(a *const u8, b *const u8, usize) int;
 extern fn memcmp(*const void, *const void, usize) int;
 extern fn strcasecmp(a *const u8, b *const u8) int;
 extern fn memcpy(*void, *const void, usize) *void;
 extern fn strcpy(*u8, *const u8) *u8;
 extern fn strerror(int) *const u8;
+extern fn strstr(*const u8, *const u8) *const u8;
 
 // ctype.h
 extern fn tolower(int) int;
diff --git a/src/main.cff b/src/main.cff
index d2330ed..32664fd 100644
--- a/src/main.cff
+++ b/src/main.cff
@@ -4,7 +4,13 @@ import "common.hff";
 extern fn main(argc int, argv **u8) int {
    assert(argc > 1, "args?");
 
-   targ_ini("amd64-sysv");
+   let triple = host_target_triple;
+   let targ = triple2targ(triple);
+   if targ == #null {
+      fprintf(stderr, "error: unsupported target triple `%s'\n", triple);
+      return 1;
+   }
+   targ_ini(targ);
 
    let p = Parser {};
    parser_init(&p, argv[1]);
diff --git a/src/targ.cff b/src/targ.cff
index c5fc093..f0b500b 100644
--- a/src/targ.cff
+++ b/src/targ.cff
@@ -31,3 +31,17 @@ extern fn targ_ini(name *const u8) bool {
    }
    return #f;
 }
+
+extern fn triple2targ(triple *const u8) *const u8 {
+   let arch = (do
+      let delim = strstr(triple, "-");
+      delim ? triple[0::delim - triple] : spanz(triple);
+   );
+   let rest = arch.#ptr + arch.#len;
+   defmacro archp(s) [ (strncmp(s, arch.#ptr, arch.#len) == 0) ]
+   defmacro restp(s) [ (strstr(rest, s) != #null) ]
+   switch {
+   case archp("x86_64") and !restp("windows"); return "amd64-sysv";
+   }
+   return #null;
+}
-- 
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