From 4fa516474b9722476aa0d83787be0bb22118b95e Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Sat, 12 Feb 2022 16:40:05 +0100
Subject: gnu: nhc98: Build with the current tool chain.

* gnu/packages/patches/nhc98-c-update.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/haskell.scm (nhc98)[source]: Use it.
[arguments]: Remove #:implicit-inputs?.
[native-inputs]: Remove.
---
 gnu/local.mk                              |  1 +
 gnu/packages/haskell.scm                  | 34 ++-----------------------
 gnu/packages/patches/nhc98-c-update.patch | 42 +++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+), 32 deletions(-)
 create mode 100644 gnu/packages/patches/nhc98-c-update.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 27ee3403da..c213311f44 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1544,6 +1544,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/nettle-3.5-check-_pkcs1_sec_decrypt-msg-len.patch \
   %D%/packages/patches/nettle-3.5-CVE-2021-3580-pt1.patch	\
   %D%/packages/patches/nettle-3.5-CVE-2021-3580-pt2.patch	\
+  %D%/packages/patches/nhc98-c-update.patch			\
   %D%/packages/patches/nix-dont-build-html-doc.diff		\
   %D%/packages/patches/nfs4-acl-tools-0.3.7-fixpaths.patch	\
   %D%/packages/patches/ngircd-handle-zombies.patch		\
diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 647b078dfd..c3706fca6c 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -123,14 +123,14 @@ top of CLISP.")
                            version ".tar.gz"))
        (sha256
         (base32
-         "0fkgxgsd2iqxvwcgnad1702kradwlbcal6rxdrgb22vd6dnc3i8l"))))
+         "0fkgxgsd2iqxvwcgnad1702kradwlbcal6rxdrgb22vd6dnc3i8l"))
+       (patches (search-patches "nhc98-c-update.patch"))))
     (build-system gnu-build-system)
     (supported-systems '("i686-linux" "x86_64-linux"))
     (arguments
      (list
       #:tests? #false                   ;there is no test target
       #:system "i686-linux"
-      #:implicit-inputs? #false
       #:parallel-build? #false          ;not supported
       #:strip-binaries? #false          ;doesn't work
       #:make-flags '(list "all-gcc")
@@ -170,36 +170,6 @@ top of CLISP.")
                       "--ccoption="
                       "--ldoption="
                       "--install"))))))
-    (native-inputs
-     `(("findutils" ,findutils)
-       ("tar" ,tar)
-       ("bzip2" ,bzip2)
-       ("gzip" ,gzip)
-       ("xz" ,xz)
-       ("diffutils" ,diffutils)
-       ("file" ,file)
-       ("gawk" ,gawk)
-
-       ("make" ,gnu-make)
-       ("sed" ,sed)
-       ("grep" ,grep)
-       ("coreutils" ,coreutils)
-       ("bash" ,bash-minimal)
-
-       ("libc" ,glibc-2.2.5)
-       ("gcc-wrapper"
-        ,(module-ref (resolve-interface
-                      '(gnu packages commencement))
-                     'gcc-2.95-wrapper))
-       ("gcc"
-        ,(module-ref (resolve-interface
-                      '(gnu packages commencement))
-                     'gcc-mesboot0))
-       ("binutils"
-        ,(module-ref (resolve-interface
-                      '(gnu packages commencement))
-                     'binutils-mesboot))
-       ("kernel-headers" ,linux-libre-headers)))
     (home-page "https://www.haskell.org/nhc98")
     (synopsis "Nearly a Haskell Compiler")
     (description
diff --git a/gnu/packages/patches/nhc98-c-update.patch b/gnu/packages/patches/nhc98-c-update.patch
new file mode 100644
index 0000000000..06e6928d14
--- /dev/null
+++ b/gnu/packages/patches/nhc98-c-update.patch
@@ -0,0 +1,42 @@
+This patch provides an update so that nhc98 can be built and works with
+a modern C compiler (GCC 11) and libc (glibc 2.33).
+
+diff --git a/Makefile.inc b/Makefile.inc
+index 4fbd47a..5bce5c9 100644
+--- a/Makefile.inc
++++ b/Makefile.inc
+@@ -1,6 +1,10 @@
+ ### Configurable variables:
+ 
+-OPT = -O3
++# We want C89 semantics plus C++-style comments and things like the
++# 'setjmp_buf' and 'u_short' types.  More importantly, build with '-O1'
++# only to avoid modern optimizations that break the code.
++OPT = -O1 -std=gnu89 -D_GNU_SOURCE=1
++
+ #ARCH = -m32
+ ARCH = 
+ 
+diff --git a/script/nhc98heap.c b/script/nhc98heap.c
+index 534010e..a30d5cd 100644
+--- a/script/nhc98heap.c
++++ b/script/nhc98heap.c
+@@ -1,5 +1,6 @@
+ #include <stdlib.h>
+ #include <stdio.h>
++#include <ctype.h>
+ main(int argc, char **argv)
+ {
+   int prefix = 1;
+diff --git a/src/runtime/Kernel/collector.c b/src/runtime/Kernel/collector.c
+index b95a273..1f879c5 100644
+--- a/src/runtime/Kernel/collector.c
++++ b/src/runtime/Kernel/collector.c
+@@ -2,6 +2,7 @@
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <string.h>
++#include <unistd.h>
+ #include "node.h"
+ /*#include "newmacros.h"  -- already included in node.h */
+ /*#include "runtime.h"    -- already included in node.h */
-- 
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