new package: gnuplot-x

Same as 'gnuplot' from termux-packages but with X11 support.

Requested in https://github.com/termux/x11-packages/issues/90.

x11-packages/gnuplot-x/Makefile.patch

@@ -0,0 +1,12 @@
+diff -u -r ../gnuplot-5.2.0/Makefile.in ./Makefile.in
+--- ../gnuplot-5.2.0/Makefile.in	2017-09-03 03:44:09.000000000 +0000
++++ ./Makefile.in	2017-10-14 20:54:05.459305245 +0000
+@@ -344,7 +344,7 @@
+ top_builddir = @top_builddir@
+ top_srcdir = @top_srcdir@
+ AUTOMAKE_OPTIONS = foreign
+-SUBDIRS = config m4 term src docs man demo tutorial share
++SUBDIRS = config m4 term src man tutorial share
+ EXTRA_DIST = BUGS Copyright FAQ.pdf GNUmakefile INSTALL INSTALL.gnu \
+ Makefile.maint PATCHLEVEL PGPKEYS README RELEASE_NOTES \
+ VERSION configure.vms win

x11-packages/gnuplot-x/build.sh

@@ -0,0 +1,28 @@
+TERMUX_PKG_HOMEPAGE=http://gnuplot.info/
+TERMUX_PKG_DESCRIPTION="Command-line driven graphing utility"
+TERMUX_PKG_LICENSE="BSD"
+TERMUX_PKG_VERSION=5.2.8
+TERMUX_PKG_SRCURL=https://downloads.sourceforge.net/project/gnuplot/gnuplot/${TERMUX_PKG_VERSION}/gnuplot-${TERMUX_PKG_VERSION}.tar.gz
+TERMUX_PKG_SHA256=60a6764ccf404a1668c140f11cc1f699290ab70daa1151bb58fed6139a28ac37
+TERMUX_PKG_DEPENDS="libandroid-support, libc++, libiconv, libx11, readline, pango, libgd, zlib"
+TERMUX_PKG_CONFLICTS="gnuplot"
+TERMUX_PKG_HOSTBUILD=true
+
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
+--with-x
+--with-lua=no
+--with-bitmap-terminals
+--with-texdir=$TERMUX_PREFIX/share/texmf
+"
+
+termux_step_host_build() {
+	"$TERMUX_PKG_SRCDIR/configure"
+	make -C docs/ gnuplot.gih
+}
+
+termux_step_post_make_install() {
+	mkdir -p $TERMUX_PREFIX/share/gnuplot/5.2/
+
+	cp $TERMUX_PKG_HOSTBUILD_DIR/docs/gnuplot.gih \
+	   $TERMUX_PREFIX/share/gnuplot/5.2/gnuplot.gih
+}

x11-packages/gnuplot-x/plot.c.patch

@@ -0,0 +1,11 @@
+--- ./src/plot.c.orig	2019-02-08 21:42:42.500914619 +0000
++++ ./src/plot.c	2019-02-08 21:43:56.702190583 +0000
+@@ -281,7 +281,7 @@
+ #endif
+ /* make sure that we really have revoked root access, this might happen if
+    gnuplot is compiled without vga support but is installed suid by mistake */
+-#ifdef __linux__
++#if defined(__linux__) && !defined(__ANDROID__)
+     if (setuid(getuid()) != 0) {
+ 	fprintf(stderr,"gnuplot: refusing to run at elevated privilege\n");
+ 	exit(EXIT_FAILURE);

x11-packages/gnuplot-x/src-command.c.patch

@@ -0,0 +1,13 @@
+For WEXITSTATUS macro.
+
+diff -u -r ../gnuplot-5.2.0/src/command.c ./src/command.c
+--- ../gnuplot-5.2.0/src/command.c	2017-08-30 18:48:26.000000000 +0000
++++ ./src/command.c	2017-10-14 20:56:13.905856980 +0000
+@@ -138,6 +138,7 @@
+ int vms_ktid;			/* key table id, for translating keystrokes */
+ #endif /* VMS */
+ 
++#include <sys/wait.h>
+ 
+ /* static prototypes */
+ static void command __PROTO((void));