From 3c3692960328b82724560bf81ade0f72b651e969 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 19 Mar 2019 15:04:29 -0400
Subject: [PATCH] zig targets prints the available libcs

---
 doc/langref.html.in | 45 ++++++++++++++++++++++++++++++++++++++++++++-
 src/main.cpp        |  9 +++++++++
 src/target.cpp      | 14 ++++++++++++++
 src/target.hpp      |  3 +++
 4 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/doc/langref.html.in b/doc/langref.html.in
index 8e6f22a049..bf24561025 100644
--- a/doc/langref.html.in
+++ b/doc/langref.html.in
@@ -8649,7 +8649,50 @@ C ABIs:
   itanium
   cygnus
   coreclr
-  simulator</code></pre>
+  simulator
+
+Available libcs:
+  aarch64_be-linux-gnu
+  aarch64_be-linux-musl
+  aarch64-linux-gnu
+  aarch64-linux-musleabi
+  armeb-linux-gnueabi
+  armeb-linux-gnueabihf
+  armeb-linux-musleabi
+  armeb-linux-musleabihf
+  arm-linux-gnueabi
+  arm-linux-gnueabihf
+  arm-linux-musleabi
+  arm-linux-musleabihf
+  i386-linux-gnu
+  i386-linux-musl
+  mips64el-linux-gnuabi64
+  mips64el-linux-gnuabin32
+  mips64el-linux-musl
+  mips64-linux-gnuabi64
+  mips64-linux-gnuabin32
+  mips64-linux-musl
+  mipsel-linux-gnu
+  mipsel-linux-musl
+  mips-linux-gnu
+  mips-linux-musl
+  nios2-linux-gnu
+  powerpc64le-linux-gnu
+  powerpc64le-linux-musl
+  powerpc64-linux-gnu
+  powerpc64-linux-musl
+  powerpc-linux-gnu
+  powerpc-linux-musl
+  riscv32-linux-musl
+  riscv64-linux-gnu
+  riscv64-linux-musl
+  s390x-linux-gnu
+  s390x-linux-musl
+  sparc-linux-gnu
+  sparcv9-linux-gnu
+  x86_64-linux-gnu
+  x86_64-linux-gnux32
+  x86_64-linux-musl</code></pre>
       <p>
       The Zig Standard Library ({#syntax#}@import("std"){#endsyntax#}) has architecture, environment, and operating system
       abstractions, and thus takes additional work to support more platforms.
diff --git a/src/main.cpp b/src/main.cpp
index f58a00209a..775ce928cd 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -191,6 +191,15 @@ static int print_target_list(FILE *f) {
         fprintf(f, "  %s%s\n", target_abi_name(abi), native_str);
     }
 
+    fprintf(f, "\nAvailable libcs:\n");
+    size_t libc_count = target_libc_count();
+    for (size_t i = 0; i < libc_count; i += 1) {
+        ZigTarget libc_target;
+        target_libc_enum(i, &libc_target);
+        fprintf(f, "  %s-%s-%s\n", target_arch_name(libc_target.arch),
+                target_os_name(libc_target.os), target_abi_name(libc_target.abi));
+    }
+
     return EXIT_SUCCESS;
 }
 
diff --git a/src/target.cpp b/src/target.cpp
index a3bccabcc4..aa6202c290 100644
--- a/src/target.cpp
+++ b/src/target.cpp
@@ -1498,3 +1498,17 @@ bool target_is_libc_lib_name(const ZigTarget *target, const char *name) {
 
     return false;
 }
+
+size_t target_libc_count(void) {
+    return array_length(libcs_available);
+}
+
+void target_libc_enum(size_t index, ZigTarget *out_target) {
+    assert(index < array_length(libcs_available));
+    out_target->arch = libcs_available[index].arch;
+    out_target->os = libcs_available[index].os;
+    out_target->abi = libcs_available[index].abi;
+    out_target->sub_arch = ZigLLVM_NoSubArch;
+    out_target->vendor = ZigLLVM_UnknownVendor;
+    out_target->is_native = false;
+}
diff --git a/src/target.hpp b/src/target.hpp
index d42ebcc576..413c814a40 100644
--- a/src/target.hpp
+++ b/src/target.hpp
@@ -169,4 +169,7 @@ bool target_is_musl(const ZigTarget *target);
 
 uint32_t target_arch_pointer_bit_width(ZigLLVM_ArchType arch);
 
+size_t target_libc_count(void);
+void target_libc_enum(size_t index, ZigTarget *out_target);
+
 #endif