From 525a3bccf105190c4b78c5c8eee9821e9951583d Mon Sep 17 00:00:00 2001
From: Apoorv Sachan <71246790+clitic@users.noreply.github.com>
Date: Thu, 8 Dec 2022 19:40:45 +0530
Subject: build.builtin: added support for clang on Windows (#1466)

---
 src/luarocks/build/builtin.lua | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/luarocks/build/builtin.lua b/src/luarocks/build/builtin.lua
index e7c0ae38..cd4d4486 100644
--- a/src/luarocks/build/builtin.lua
+++ b/src/luarocks/build/builtin.lua
@@ -180,12 +180,20 @@ function builtin.run(rockspec, no_install)
          add_flags(extras, "-I%s", incdirs)
          return execute(variables.CC.." "..variables.CFLAGS, "-c", "-o", object, "-I"..variables.LUA_INCDIR, source, unpack(extras))
       end
-      compile_library = function(library, objects, libraries, libdirs)
+      compile_library = function(library, objects, libraries, libdirs, name)
          local extras = { unpack(objects) }
          add_flags(extras, "-L%s", libdirs)
          add_flags(extras, "-l%s", libraries)
          extras[#extras+1] = dir.path(variables.LUA_LIBDIR, variables.LUALIB)
-         extras[#extras+1] = "-l" .. (variables.MSVCRT or "m")
+
+         if variables.CC == "clang" or variables.CC == "clang-cl" then
+            local exported_name = name:gsub("%.", "_")
+            exported_name = exported_name:match('^[^%-]+%-(.+)$') or exported_name
+            extras[#extras+1] = string.format("-Wl,-export:luaopen_%s", exported_name)
+         else
+            extras[#extras+1] = "-l" .. (variables.MSVCRT or "m")
+         end
+
          local ok = execute(variables.LD.." "..variables.LDFLAGS.." "..variables.LIBFLAG, "-o", library, unpack(extras))
          return ok
       end
-- 
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