app-text/htmldoc: respect system toolchain settings

If CC and CXX variables are not exported to configure, it ignores
system toolchain setup and forces its own compiler preferences,
where clang/clang++ are on the first place if found. This is likely
not what users want and causes configure failure if CFLAGS/CXXFLAGS
contain flag(s) not supported by clang, but supported by gcc.

Package-Manager: portage-2.3.0_rc1
Signed-off-by: Andrew Savchenko <bircoph@gentoo.org>

app-text/htmldoc/htmldoc-1.8.29.ebuild

@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=6
-inherit eutils
+inherit eutils toolchain-funcs
 
 DESCRIPTION="Convert HTML pages into a PDF document"
 SRC_URI="http://www.msweet.org/files/project1/${P}-source.tar.bz2"
@@ -36,6 +36,7 @@ src_prepare() {
 src_configure() {
 	local myconf="$(use_with fltk gui)"
 
+	CC=$(tc-getCC) CXX=$(tc-getCXX) \
 	econf ${myconf}
 	# Add missing -lfltk_images to LIBS
 	if use fltk; then