Simply cc program to not require libcxx

cc-toolchain/basic/gcc/toolchain/cc_toolchain.BUILD

@@ -4,11 +4,9 @@ cc_toolchain_config(
     name = "cc_toolchain_config",
     abi_libc_version = "unknown",
     abi_version = "unknown",
-    # TODO Remove absolute path
     builtin_sysroot = "external/gcc_toolchain/x86_64-buildroot-linux-gnu/sysroot",
     compile_flags = [
-        # "-no-canonical-prefixes",
-        "-v",
+        "-no-canonical-prefixes",
         "-fno-canonical-system-headers",
         "-isystem",
         "external/gcc_toolchain/x86_64-buildroot-linux-gnu/include/c++/12.3.0",
@@ -32,9 +30,11 @@ cc_toolchain_config(
     ],
     host_system_name = "local",
     link_flags = [
-        "-v",
-        # "-fuse-ld=lld",
-        "-print-search-dirs",
+        # "-Wl,--sysroot=/usr/local/google/home/vinhdaitran/github/daivinhtran/examples/cc-toolchain/bazel-cc-toolchain/external/gcc_toolchain/x86_64-buildroot-linux-gnu/sysroot",
+        # FIX ME: Needed to link to libc.so.6 from toolchain's sysroot instead of /lib/x86_64-linux-gnu/libc.so.6
+        # Error: cannot find /lib64/libc.so.6: cannot find /usr/lib64/libc_nonshared.a:
+        # Symlinks in Bazel sandbox messes up the sysroot so libc.so.6 and libc_nonshared.a can't be found
+        # Running the link action outsize of Bazel works.
         "-Bexternal/gcc_toolchain/x86_64-buildroot-linux-gnu/sysroot/bin",
         "-Bexternal/gcc_toolchain/x86_64-buildroot-linux-gnu/sysroot/usr/lib64",
         "-Bexternal/gcc_toolchain/x86_64-buildroot-linux-gnu/sysroot/lib64",
@@ -94,9 +94,13 @@ filegroup(
     srcs = glob(
         include = [
             "lib64/**",
+            # FIX ME: Even though link action sets --sysroot=external/gcc_toolchain/x86_64-buildroot-linux-gnu/sysroot
+            # libc.so.6 is not found.
+            # See https://stackoverflow.com/questions/52386530/linker-fails-in-sandbox-when-running-through-bazel-but-works-when-sandboxed-comm
+            # Symlinks in Bazel sandbox messes up the sysroot so libc.so.6 and libc_nonshared.a can't be found
+            # Running the link action outsize of Bazel works.
             "x86_64-buildroot-linux-gnu/sysroot/lib64/libc.so.6",
             "x86_64-buildroot-linux-gnu/sysroot/usr/lib64/**",
-            # "x86_64-buildroot-linux-gnu/sysroot/usr/lib64/crti.o",
             "lib64/gcc/x86_64-buildroot-linux-gnu/12.3.0/**",
         ],
         exclude = [

cc-toolchain/main/hello-world.cc

@@ -1,12 +1,6 @@
-#include <iostream>
-
-std::string get_greet(const std::string& who) {
-  return "Hello " + who;
-}
-
-
-int main(int argc, char** argv) {
-//   std::string who = "world";
-//   std::cout << get_greet(who) << std::endl;
-  return 0;
+#include <stdio.h>
+int main() {
+   // printf() displays the string inside quotation
+   printf("Hello, World!");
+   return 0;
 }