gnu: txr: Call ./configure manually instead of patching.

* gnu/packages/lisp.scm (txr)[source]: Remove patch.
[arguments]: Add ‘--prefix’ to #:configure-flags.
Use a custom ‘configure’ phase.
* gnu/packages/patches/txr-shell.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -1480,7 +1480,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/ttfautohint-source-date-epoch.patch	\
   %D%/packages/patches/tomb-fix-errors-on-open.patch		\
   %D%/packages/patches/tuxpaint-stamps-path.patch		\
-  %D%/packages/patches/txr-shell.patch				\
   %D%/packages/patches/u-boot-riscv64-fix-extlinux.patch	\
   %D%/packages/patches/ucx-tcp-iface-ioctl.patch		\
   %D%/packages/patches/udiskie-no-appindicator.patch		\

gnu/packages/lisp.scm

@@ -853,22 +853,31 @@ enough to play the original mainframe Zork all the way through.")
              (url "http://www.kylheku.com/git/txr/")
              (commit (string-append "txr-" version))))
        (file-name (git-file-name name version))
-       (patches (search-patches "txr-shell.patch"))
        (sha256
         (base32
          "0c9qsj4xwc24c9g02mr5n97m4d87d4n0pcc2c2n58l2vg5dnzba0"))))
     (build-system gnu-build-system)
     (arguments
-     '(#:configure-flags '("cc=gcc")
+     '(#:configure-flags
+       (list "cc=gcc"
+             (string-append "--prefix=" (assoc-ref %outputs "out")))
        #:test-target "tests"
-       #:phases (modify-phases %standard-phases
-                  (add-after 'configure 'fix-tests
-                    (lambda _
-                      (substitute* "tests/017/realpath.tl"
-                        (("/usr/bin") "/"))
-                      (substitute* "tests/017/realpath.expected"
-                        (("/usr/bin") "/"))
-                      #t)))))
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'configure
+           ;; ./configure is a hand-written script that can't handle standard
+           ;; autotools arguments like CONFIG_SHELL.
+           (lambda* (#:key configure-flags #:allow-other-keys)
+             (setenv "txr_shell" (which "bash"))
+             (apply invoke "./configure" configure-flags)
+             #t))
+         (add-after 'configure 'fix-tests
+           (lambda _
+             (substitute* "tests/017/realpath.tl"
+               (("/usr/bin") "/"))
+             (substitute* "tests/017/realpath.expected"
+               (("/usr/bin") "/"))
+             #t)))))
     (native-inputs
      `(("bison" ,bison)
        ("flex" ,flex)))

gnu/packages/patches/txr-shell.patch

@@ -1,59 +0,0 @@
-Use the current shell instead of trying to find another one and
-failing to do so.
-
-diff --git a/configure b/configure
-index f1adb919..7891b4dc 100755
---- a/configure
-+++ b/configure
-@@ -26,28 +26,6 @@
- # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- 
--#
--# The #!/bin/sh might be some legacy piece of crap,
--# not even up to 1990 POSIX.2 spec. So the first step
--# is to look for a better shell in some known places
--# and re-execute ourselves with that interpreter.
--#
--
--if test x$txr_shell = x ; then
--  for shell in /bin/bash /usr/bin/bash /usr/xpg4/bin/sh ; do
--    if test -x $shell ; then
--       txr_shell=$shell
--       break
--    fi
--  done
--  if test x$txr_shell = x ; then
--    echo "No known POSIX shell found: falling back on /bin/sh, which may not work"
--    txr_shell=/bin/sh
--  fi
--  export txr_shell
--  exec $txr_shell $0 ${@+"$@"}
--fi
--
- set -u
- 
- #
-@@ -190,13 +168,6 @@ while [ $# -gt 0 ] ; do
-     exit 1
-   fi
- 
--  eval "var_exists=\${$var+y}"
--
--  if [ "$var_exists" != y ] ; then
--    printf "$0: nonexistent option: '%s'\n" "$1"
--    exit 1
--  fi
--
-   eval "$var='$val'"
- 
-   eval "var_given_exists=\${${var}_given+y}"
-@@ -208,6 +179,8 @@ while [ $# -gt 0 ] ; do
-   shift
- done
- 
-+txr_shell=$CONFIG_SHELL
-+
- #
- # If --help was given (or --help=<nonempty> or help=<nonempty>) then
- # print help and exit. The termination status is failed, to indicate