mutt: Various fixes and improvements

- Fix hardlink usage which doesn't work on Android 6.
- Enable header cache and depend on gdbm.
- Specify $PREFIX/bin/sh as exec shell to avoid trying /bin/sh.
  Fixes #84.
- Avoid building bundled&broken (v)snprintf functions.

packages/mutt/build.sh

@@ -1,9 +1,22 @@
 TERMUX_PKG_HOMEPAGE=http://www.mutt.org/
 TERMUX_PKG_DESCRIPTION="Mail client"
 TERMUX_PKG_VERSION=1.5.24
+TERMUX_PKG_BUILD_REVISION=1
 TERMUX_PKG_SRCURL=https://bitbucket.org/mutt/mutt/downloads/mutt-${TERMUX_PKG_VERSION}.tar.gz
-TERMUX_PKG_DEPENDS="libandroid-support, ncurses, openssl"
-TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--enable-smtp --enable-imap --enable-pop --with-mailpath=$TERMUX_PREFIX/var/mail --with-ssl --enable-compressed --without-idn"
+TERMUX_PKG_DEPENDS="libandroid-support, ncurses, gdbm, openssl"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--enable-smtp --enable-imap --enable-pop --with-mailpath=$TERMUX_PREFIX/var/mail --with-ssl --enable-compressed --without-idn --enable-hcache"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --with-exec-shell=$TERMUX_PREFIX/bin/sh"
+# The mutt autoconf guesses no for working (v)snprintf and uses broken local versions - avoid that:
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" mutt_cv_c99_snprintf=yes mutt_cv_c99_vsnprintf=yes"
+# TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --with-sasl"
+# bin/{flea,muttbug}: File bug against mutt:
+TERMUX_PKG_RM_AFTER_INSTALL="bin/flea bin/muttbug"
+
+termux_step_post_configure () {
+	# Build wants to run mutt_md5 at build time:
+	gcc -D'uint32_t=unsigned int' -DMD5UTIL $TERMUX_PKG_SRCDIR/md5.c -o $TERMUX_PKG_BUILDDIR/mutt_md5
+	$TERMUX_TOUCH -d "next hour" $TERMUX_PKG_BUILDDIR/mutt_md5
+}
 
 termux_step_post_make_install () {
         cp $TERMUX_PKG_SRCDIR/doc/mutt.man $TERMUX_PREFIX/share/man/man1/mutt.1.man

packages/mutt/lib.c.patch

@@ -0,0 +1,22 @@
+diff -u -r ../mutt-1.5.24/lib.c ./lib.c
+--- ../mutt-1.5.24/lib.c	2015-08-30 13:06:38.000000000 -0400
++++ ./lib.c	2015-12-13 17:05:02.546904223 -0500
+@@ -445,6 +445,10 @@
+ 
+ int safe_rename (const char *src, const char *target)
+ {
++#ifdef __ANDROID__
++  /* Android (since 6.0) does not support hardlinks. */
++  return rename(src, target);
++#else
+   struct stat ssb, tsb;
+ 
+   if (!src || !target)
+@@ -537,6 +541,7 @@
+   
+ 
+   return 0;
++#endif
+ }
+ 
+