app-misc/dfshow: use PKG_CHECK_MODULES for ncurses, libconfig

* Use PKG_CHECK_MODULES to find ncurses (and libconfig while we're
  at it) rather than assuming e.g. split tinfo.

* Add the standard macOS LDFLAGS needed. No point in bothering upstream
  with libtool just for this.

Signed-off-by: Sam James <sam@gentoo.org>
Signed-off-by: David Seifert <soap@gentoo.org>

2 files changed, 94 insertions, 3 deletions

diff --git a/app-misc/dfshow/dfshow-0.9.1_beta-r1.ebuild b/app-misc/dfshow/dfshow-0.9.1_beta-r1.ebuild
index 883ebd7c7fee..d6a901fd6e7d 100644
--- a/app-misc/dfshow/dfshow-0.9.1_beta-r1.ebuild
+++ b/app-misc/dfshow/dfshow-0.9.1_beta-r1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=7
 
-inherit autotools bash-completion-r1
+inherit autotools bash-completion-r1 flag-o-matic
 
 MY_PV="${PV//_beta/-beta}"
 DESCRIPTION="DF-SHOW is a Unix-like rewrite of some of the applications from DF-EDIT"
@@ -19,11 +19,20 @@ DEPEND="dev-libs/libconfig:=
 	sys-libs/ncurses:0=
 "
 RDEPEND="${DEPEND}"
+BDEPEND="virtual/pkgconfig"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.9.1_beta-use-PKG_CHECK_MODULES-for-ncurses-libconfig.patch
+)
 
 src_prepare() {
 	default
-	sed -i 's/LDADD = -lncursesw -lm -lconfig/LDADD = -lncursesw -lm -lconfig -ltinfow/' Makefile.am ||
-		die "sed in Makefile.am failed"
+
+	if [[ ${CHOST} == *-darwin* ]] ; then
+		# Standard on macOS
+		# No real motivation to push libtool upstream just for this
+		append-ldflags -Wl,-undefined -Wl,dynamic_lookup
+	fi
 
 	eautoreconf
 }
diff --git a/app-misc/dfshow/files/dfshow-0.9.1_beta-use-PKG_CHECK_MODULES-for-ncurses-libconfig.patch b/app-misc/dfshow/files/dfshow-0.9.1_beta-use-PKG_CHECK_MODULES-for-ncurses-libconfig.patch
new file mode 100644
index 000000000000..33c5bc35dfb4
--- /dev/null
+++ b/app-misc/dfshow/files/dfshow-0.9.1_beta-use-PKG_CHECK_MODULES-for-ncurses-libconfig.patch
@@ -0,0 +1,82 @@
+From a8185ad9270db54b9e0c66002e7ceebdc264af19 Mon Sep 17 00:00:00 2001
+From: Sam James <sam@gentoo.org>
+Date: Fri, 30 Apr 2021 04:49:26 +0100
+Subject: [PATCH] Use PKG_CHECK_MODULES for ncurses, libconfig
+
+It's not always clear how to link against ncurses
+and the choices before us are:
+1) use a convoluted chain of autoconf checks
+2) use pkg-config (this commit)
+3) guess and hardcode the most popular values
+
+This is an iteration of a previous change [0] by a
+Gentoo contributor which landed upstream.
+
+The previous change ended up doing 3) which is fine
+but doesn't always work in strange situations. Gentoo
+_usually_ builds 'split tinfo' on Linux but this isn't
+guaranteed.
+
+This change now uses PKG_CHECK_MODULES which uses
+pkg-config behind the scenes to query ncurses
+for the correct way to build & link against it.
+
+(We do the same thing for libconfig too.)
+
+[0] https://github.com/roberthawdon/dfshow/pull/115
+---
+ Makefile.am  | 13 ++++---------
+ configure.ac |  5 +++--
+ 2 files changed, 7 insertions(+), 11 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index 048ded5..6dcaa1f 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -4,21 +4,16 @@ dfshowconfdir = $(sysconfdir)
+ dfshowdatadir = $(datadir)/dfshow
+ 
+ AM_CFLAGS = -DSYSCONFIG=\"$(dfshowconfdir)\" -DDATADIR=\"$(dfshowdatadir)\" -D_XOPEN_SOURCE_EXTENDED -fno-common
++AM_CFLAGS += $(ncurses_CFLAGS) $(libconfig_CFLAGS)
+ 
+-LDADD = -lm -lconfig
+-
+-if DARWIN
+-LDADD += -lncurses
+-else
+-LDADD += -lncursesw
+-endif
++LDADD = -lm $(ncurses_LIBS) $(libconfig_LIBS)
+ 
+ if LINUX
+-LDADD += -lacl -ltinfo
++LDADD += -lacl
+ endif
+ 
+ if HURD
+-LDADD += -lacl -ltinfo
++LDADD += -lacl
+ endif
+ 
+ if SELINUX
+diff --git a/configure.ac b/configure.ac
+index f185b69..8acf1ab 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -32,10 +32,11 @@ AC_CHECK_FUNCS(acl_get facl_get acl_set facl_set)
+ 
+ AC_CHECK_MEMBERS([struct stat.st_author])
+ AC_CHECK_HEADERS([stdio.h limits.h signal.h ctype.h wctype.h getopt.h sys/types.h sys/stat.h dirent.h fcntl.h pwd.h string.h stdlib.h unistd.h time.h sys/statvfs.h libgen.h errno.h wchar.h hurd.h math.h sys/sysmacros.h regex.h utime.h sys/xattr.h acl/libacl.h stdint.h])
+-AC_CHECK_HEADERS(ncurses.h, , AC_MSG_ERROR(ncurses header (ncurses.h) not found. You may need to install an ncurses development package.))
+-AC_CHECK_HEADERS(libconfig.h, , AC_MSG_ERROR(libconfig header (libconfig.h) not found. You may need to install a libconfig development package.))
+ AC_CHECK_HEADERS(sys/acl.h, , AC_MSG_ERROR(libacl header (sys/acl.h) not found. You may need to install a libacl development package.))
+ 
++PKG_CHECK_MODULES([ncurses], [ncurses])
++PKG_CHECK_MODULES([libconfig], [libconfig])
++
+ AC_ARG_WITH([selinux], AS_HELP_STRING([--with-selinux], [Build with selinux library (default: disabled)]))
+ AC_ARG_ENABLE([move-between-devices], AS_HELP_STRING([--enable-move-between-devices], [Enable moving objects between mounted devices (default: disabled)]))
+ 
+-- 
+2.31.1
+