generate a zig libc file for building libraries for macos

Author: adnanhashmi09

libc.txt

@@ -0,0 +1,25 @@
+# The directory that contains `stdlib.h`.
+# On POSIX-like systems, include directories be found with: `cc -E -Wp,-v -xc /dev/null`
+include_dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
+
+# The system-specific include directory. May be the same as `include_dir`.
+# On Windows it's the directory that includes `vcruntime.h`.
+# On POSIX it's the directory that includes `sys/errno.h`.
+sys_include_dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
+
+# The directory that contains `crt1.o` or `crt2.o`.
+# On POSIX, can be found with `cc -print-file-name=crt1.o`.
+# Not needed when targeting MacOS.
+crt_dir=
+
+# The directory that contains `vcruntime.lib`.
+# Only needed when targeting MSVC on Windows.
+msvc_lib_dir=
+
+# The directory that contains `kernel32.lib`.
+# Only needed when targeting MSVC on Windows.
+kernel32_lib_dir=
+
+# The directory that contains `crtbeginS.o` and `crtendS.o`
+# Only needed when targeting Haiku.
+gcc_dir=