Fix LTO link flags, experiment with static builds

Signed-off-by: falkTX <falktx@falktx.com>

Makefile.base.mk

@@ -190,9 +190,14 @@ BASE_FLAGS += -DNDEBUG $(BASE_OPTS) -fvisibility=hidden
 CXXFLAGS   += -fvisibility-inlines-hidden
 endif
 
+ifeq ($(STATIC_BUILD),true)
+BASE_FLAGS += -DSTATIC_BUILD
+# LINK_OPTS  += -static
+endif
+
 ifeq ($(WITH_LTO),true)
 BASE_FLAGS += -fno-strict-aliasing -flto
-LINK_FLAGS += -fno-strict-aliasing -flto -Werror=odr -Werror=lto-type-mismatch
+LINK_OPTS  += -fno-strict-aliasing -flto -Werror=odr -Werror=lto-type-mismatch
 endif
 
 BUILD_C_FLAGS   = $(BASE_FLAGS) -std=gnu99 $(CFLAGS)

Makefile.plugins.mk

@@ -73,8 +73,10 @@ BASE_FLAGS += -DHAVE_JACK
 
 # always needed
 ifneq ($(HAIKU_OR_MACOS_OR_WINDOWS),true)
+ifneq ($(STATIC_BUILD),true)
 LINK_FLAGS += -ldl
 endif
+endif
 
 # ---------------------------------------------------------------------------------------------------------------------
 # Set files to build

distrho/src/DistrhoUtils.cpp

@@ -23,7 +23,9 @@
 #ifdef DISTRHO_OS_WINDOWS
 # include <windows.h>
 #else
-# include <dlfcn.h>
+# ifndef STATIC_BUILD
+#  include <dlfcn.h>
+# endif
 # include <limits.h>
 # include <stdlib.h>
 #endif
@@ -59,7 +61,7 @@ const char* getBinaryFilename()
     filenameBuf[0] = '\0';
     GetModuleFileName(hInstance, filenameBuf, sizeof(filenameBuf));
     filename = filenameBuf;
-#else
+#elif !defined(STATIC_BUILD)
     Dl_info info;
     dladdr((void*)getBinaryFilename, &info);
     char filenameBuf[PATH_MAX];