gentoo-overlay/dev-tcltk/blt/files/blt-2.5.3-gentoo.patch

--- a/configure.in	2021-01-03 20:59:43.337589407 +0100
+++ b/configure.in	2021-01-03 21:00:48.936539537 +0100
@@ -56,10 +56,6 @@
   blt_enable_jpeg=$enableval ])
 AC_ARG_ENABLE(cygwin,	[  --enable-cygwin         Use cygwin Tcl/Tk libraries. Requires cygwin1.dll], [
   blt_enable_cygwin=$enableval ])
-AC_ARG_WITH(cc,		[  --with-cc=CC            Set C compiler to CC], [
-  blt_with_cc=$with_cc 
-  unset ac_cv_prog_CC
-  unset ac_cv_prog_CPP ])
 AC_ARG_WITH(cflags,	[  --with-cflags=FLAGS     Set compiler flags to FLAGS],
   blt_with_cflags="$with_cflags")
 AC_ARG_WITH(gnu_ld,	[  --with-gnu-ld           Use GNU linker],
@@ -96,22 +92,7 @@
 #
 
 AC_MSG_CHECKING([which C compiler])
-if test "x${blt_with_cc}" != "x" ; then 
-  CC=${blt_with_cc}
-  unset ac_cv_prog_CPP
-  unset ac_cv_prog_CC
-elif test "x${BLT_ENV_CC}" != "x" ; then
-  unset ac_cv_prog_CPP
-  unset ac_cv_prog_CC
-elif test "x${blt_cv_prog_cc}" != "x" ; then
-  CC=${blt_cv_prog_cc}
-  unset ac_cv_prog_CC
-else 
-  AC_PROG_CC
-fi
-if test "x${CC}" = "x" ; then
-  CC=cc
-fi
+AC_PROG_CC
 
 case $target in
   *-*-cygwin*|*-*-mingw*)
@@ -125,7 +106,6 @@
 
 unset blt_cv_prog_cc
 AC_CACHE_VAL(blt_cv_prog_cc, blt_cv_prog_cc=$CC)
-AC_SUBST(CC)
 AC_PROG_CPP
 AS_IF([test "x${GCC}" != "x"],[
   blt_have_gcc="yes"