[Powertop] [PATCH] use pkg-config to find ncurses

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Original bug report: https://bugs.gentoo.org/show_bug.cgi?id=486124

Depending on how ncurses is built, it may require different information
passed to the linker.  Use pkg-config to detect the correct information:

- --- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,7 @@
 AC_FUNC_STRTOD
 AC_CHECK_FUNCS([fdatasync getpagesize gettimeofday memmove memset mkdir
munmap pow realpath regcomp select setlocale socket sqrt strcasecmp
strchr strdup strerror strncasecmp strstr strtoul strtoull])

- -AC_SEARCH_LIBS([delwin], [ncursesw ncurses], [], AC_MSG_ERROR([ncurses
is required but was not found]), [])
+PKG_CHECK_MODULES(ncurses, ncurses, [LIBS="$LIBS $ncurses_LIBS"],
AC_MSG_ERROR([ncurses is required but was not found]))

 has_libpci=0
 PKG_CHECK_MODULES([PCIUTILS], [libpci],[has_libpci=1],[


Original patch:
http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-power/powertop/files/powertop-2.4-tinfo.patch?revision=1.1&view=markup

Please include this fix.

thanks,
Zero
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