x11-fm/polo: respect CFLAGS to unbreak the build on recent -CURRENT

Commit c57cd43 had pacified one particular warning which often
breaks Vala code compilation with Clang 16, thus correct fix is not
to force an older compiler, but to pass down our CFLAGS to valac(1)
together with -v option to make the actual compiler call visible in
the build logs.

Fixes:	09e56dc

x11-fm/polo/Makefile

@@ -21,18 +21,8 @@ GH_ACCOUNT=	teejee2008
 USE_GNOME=	cairo gdkpixbuf2 gtk30 libxml2 vte3
 
 MAKEFILE=	makefile
-
 WRKSRC_SUBDIR=	src
 
-.include <bsd.port.options.mk>
-
-.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400091 || ( ${OSVERSION} >= 1302507 && ${OSVERSION} < 1400000 ))
-USES+=	llvm:max=15
-CC=	clang${LLVM_VERSION}
-CPP=	clang-cpp${LLVM_VERSION}
-CXX=	clang++${LLVM_VERSION}
-.endif
-
 post-patch:
 	@${RM} ${WRKSRC}/share/polo/files/gtk-theme/*.orig
 	@${RM} ${WRKSRC}/share/polo/files/install-*.sh

x11-fm/polo/files/patch-makefile

@@ -2,14 +2,33 @@
 +++ makefile
 @@ -1,7 +1,7 @@
 -SHELL=/bin/bash
+-CFLAGS=--std=c99
 +SHELL=/bin/sh
- CFLAGS=--std=c99
++XCCFLAGS=$(foreach arg,$(CFLAGS),--Xcc=$(arg))
 
 -prefix=/usr
 +prefix=$(PREFIX)
  bindir=$(prefix)/bin
  sharedir=$(prefix)/share
  localedir=$(sharedir)/locale
+@@ -43,7 +43,7 @@ app-gtk:
+
+ 	#polo-gtk
+ 	valac -X -D'GETTEXT_PACKAGE="${app_name}"' \
+-		--Xcc="-lm" ${define_symbols} --Xcc="-O3" --thread \
++		--Xcc="-lm" ${define_symbols} ${XCCFLAGS} -v --thread \
+ 		Common/Main.vala \
+ 		Gtk/*.vala \
+ 		Utility/*.vala \
+@@ -60,7 +60,7 @@ app-util-gtk3:
+
+ app-util-disk:
+ 	valac --Xcc="-lm" -X -D'GETTEXT_PACKAGE="${app_name}"' \
+-		"polo-disk.vala" Console/*.vala --Xcc="-O3" -o polo-disk --pkg posix --pkg gio-unix-2.0 --pkg gee-0.8
++		"polo-disk.vala" Console/*.vala ${XCCFLAGS} -v -o polo-disk --pkg posix --pkg gio-unix-2.0 --pkg gee-0.8
+
+ app-translations:
+
 @@ -101,17 +101,15 @@ install:
  	mkdir -p "$(DESTDIR)$(sharedir)/${app_name}"
  	mkdir -p "$(DESTDIR)$(sharedir)/pixmaps"