nitc: intro command option --shared-lib to compile to a .so or .dll

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/src/compiler/abstract_compiler.nit b/src/compiler/abstract_compiler.nit
index b0cbd03..aeed299 100644 (file)
--- a/src/compiler/abstract_compiler.nit
+++ b/src/compiler/abstract_compiler.nit
@@ -39,6 +39,8 @@ redef class ToolContext
        var opt_no_cc = new OptionBool("Do not invoke the C compiler", "--no-cc")
        # --no-main
        var opt_no_main = new OptionBool("Do not generate main entry point", "--no-main")
+       # --shared-lib
+       var opt_shared_lib = new OptionBool("Compile to a native shared library", "--shared-lib")
        # --make-flags
        var opt_make_flags = new OptionString("Additional options to the `make` command", "--make-flags")
        # --max-c-lines
@@ -81,7 +83,7 @@ redef class ToolContext
        redef init
        do
                super
-               self.option_context.add_option(self.opt_output, self.opt_dir, self.opt_run, self.opt_no_cc, self.opt_no_main, self.opt_make_flags, self.opt_compile_dir, self.opt_hardening)
+               self.option_context.add_option(self.opt_output, self.opt_dir, self.opt_run, self.opt_no_cc, self.opt_no_main, self.opt_shared_lib, self.opt_make_flags, self.opt_compile_dir, self.opt_hardening)
                self.option_context.add_option(self.opt_no_check_covariance, self.opt_no_check_attr_isset, self.opt_no_check_assert, self.opt_no_check_autocast, self.opt_no_check_null, self.opt_no_check_all)
                self.option_context.add_option(self.opt_typing_test_metrics, self.opt_invocation_metrics, self.opt_isset_checks_metrics)
                self.option_context.add_option(self.opt_no_stacktrace)
@@ -92,6 +94,7 @@ redef class ToolContext
                self.option_context.add_option(self.opt_trace)
 
                opt_no_main.hidden = true
+               opt_shared_lib.hidden = true
        end
 
        redef fun process_options(args)
@@ -391,6 +394,13 @@ LDLIBS  ?= -lm {{{linker_options.join(" ")}}}
 
                if self.toolcontext.opt_trace.value then makefile.write "LDLIBS += -llttng-ust -ldl\n"
 
+               if toolcontext.opt_shared_lib.value then
+                       makefile.write """
+CFLAGS += -fPIC
+LDFLAGS += -shared -Wl,-soname,{{{outname}}}
+"""
+               end
+
                makefile.write "\n# SPECIAL CONFIGURATION FLAGS\n"
                if platform.supports_libunwind then
                        if toolcontext.opt_no_stacktrace.value then