Make this work with gcc15

Remove base-gcc from COMPILER, replace the CXXFLAGS_base-clang with
CXXFLAGS so that the right -std=c++XY is passed to the compiler since
in most cases the c++ needs to be downgraded to make the code compile.

OK sthen@ tb@

comms/fldigi/Makefile

@@ -19,9 +19,9 @@ WANTLIB += Xrender
 
 SITES=		${SITE_SOURCEFORGE:=fldigi/}
 
-COMPILER =	base-clang ports-gcc base-gcc
+COMPILER =	base-clang ports-gcc
 
-CXXFLAGS_base-clang =	-std=gnu++0x
+CXXFLAGS =	-std=gnu++0x
 
 RUN_DEPENDS=	devel/desktop-file-utils
 BUILD_DEPENDS=	textproc/asciidoc

devel/commoncpp/Makefile

@@ -17,9 +17,9 @@ PERMIT_PACKAGE=	Yes
 
 WANTLIB=	crypto ssl z m ${COMPILER_LIBCXX} pthread
 
-COMPILER =		base-clang ports-gcc base-gcc
+COMPILER =		base-clang ports-gcc
 
-CXXFLAGS_base-clang=	-std=c++98
+CXXFLAGS =	-std=c++98
 
 CONFIGURE_STYLE= autoconf
 AUTOCONF_VERSION= 2.61

graphics/freeimage/Makefile

@@ -14,9 +14,9 @@ PERMIT_PACKAGE=	Yes
 
 WANTLIB=		${COMPILER_LIBCXX} m
 
-COMPILER =		base-clang ports-gcc base-gcc
+COMPILER =		base-clang ports-gcc
 
-CXXFLAGS_base-clang =	-std=c++14
+CXXFLAGS =		-std=c++14
 
 SITES=			${SITE_SOURCEFORGE:=freeimage/}
 EXTRACT_SUFX=		.zip

graphics/lsys/Makefile

@@ -14,9 +14,9 @@ SITES=		http://crappydiffs.org/
 
 WANTLIB += GL GLU X11 Xext c m pthread ${COMPILER_LIBCXX}
 
-COMPILER =		base-clang ports-gcc base-gcc
+COMPILER =		base-clang ports-gcc
 
-CXXFLAGS_base-clang =	-std=c++14
+CXXFLAGS =		-std=c++14
 
 CONFIGURE_STYLE=	gnu
 CONFIGURE_ENV=		CPPFLAGS="-I${LOCALBASE}/include -I${X11BASE}/include" \

java/jlint/Makefile

@@ -10,8 +10,8 @@ HOMEPAGE=	https://jlint.sourceforge.net/
 PERMIT_PACKAGE=	Yes
 WANTLIB=		c z m ${COMPILER_LIBCXX}
 
-COMPILER =		base-clang ports-gcc base-gcc
-CXXFLAGS_base-clang =	-std=c++14
+COMPILER =	base-clang ports-gcc
+CXXFLAGS =	-std=c++14
 
 SITES=		${SITE_SOURCEFORGE:=jlint/}