From e3b3156995345042b0b5d08d86c7b94c22d80120 Mon Sep 17 00:00:00 2001
From: Grace Dinh <git@contact.dinh.ai>
Date: Tue, 23 Aug 2022 15:18:45 -0700
Subject: [PATCH 1/2] libamplsolver: add darwin support

---
 .../science/math/libamplsolver/default.nix    | 15 ++++---
 .../libamplsolver-sharedlib.patch             | 39 +++++++++++++++++++
 2 files changed, 46 insertions(+), 8 deletions(-)
 create mode 100644 pkgs/development/libraries/science/math/libamplsolver/libamplsolver-sharedlib.patch

diff --git a/pkgs/development/libraries/science/math/libamplsolver/default.nix b/pkgs/development/libraries/science/math/libamplsolver/default.nix
index bcbde5f61359..d6e9db9d341d 100644
--- a/pkgs/development/libraries/science/math/libamplsolver/default.nix
+++ b/pkgs/development/libraries/science/math/libamplsolver/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchpatch }:
+{ lib, stdenv, substitute, fetchurl, fetchpatch }:
 
 stdenv.mkDerivation rec {
   pname = "libamplsolver";
@@ -10,18 +10,17 @@ stdenv.mkDerivation rec {
   };
 
   patches = [
-    # Debian provides a patch to build a shared library
-    (fetchpatch {
-      url = "https://sources.debian.org/data/main/liba/libamplsolver/0~20190702-2/debian/patches/fix-makefile-shared-lib.patch";
-      sha256 = "sha256-96qwj3fLugzbsfxguKMce13cUo7XGC4VUE7xKcJs42Y=";
+    (substitute {
+      src = ./libamplsolver-sharedlib.patch;
+      replacements = [ "--replace" "@sharedlibext@" "${stdenv.hostPlatform.extensions.sharedLibrary}" ];
     })
   ];
 
   installPhase = ''
     runHook preInstall
-    pushd sys.`uname -m`.`uname -s`
+    pushd sys.$(uname -m).$(uname -s)
     install -D -m 0644 *.h -t $out/include
-    install -D -m 0644 *.so* -t $out/lib
+    install -D -m 0644 *${stdenv.hostPlatform.extensions.sharedLibrary}* -t $out/lib
     install -D -m 0644 *.a -t $out/lib
     popd
     runHook postInstall
@@ -31,7 +30,7 @@ stdenv.mkDerivation rec {
     description = "A library of routines that help solvers work with AMPL";
     homepage = "https://ampl.com/netlib/ampl/";
     license = [ licenses.mit ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     maintainers = with maintainers; [ aanderse ];
   };
 }
diff --git a/pkgs/development/libraries/science/math/libamplsolver/libamplsolver-sharedlib.patch b/pkgs/development/libraries/science/math/libamplsolver/libamplsolver-sharedlib.patch
new file mode 100644
index 000000000000..f2af2910e89c
--- /dev/null
+++ b/pkgs/development/libraries/science/math/libamplsolver/libamplsolver-sharedlib.patch
@@ -0,0 +1,39 @@
+Authors: Andrei Rozanski and Grace Dinh
+Last-Update: 2022-08-23
+Description: fix makefile.u in order to get libamplsover.so (Linux) or libamplsolver.dylib (Mac)
+
+--- a/makefile.u
++++ b/makefile.u
+
+@@ -26,8 +26,9 @@
+
+ .SUFFIXES: .c .o
+ CC = cc
+-CFLAGS = -O
++CFLAGS := $(CFLAGS) -pipe -DASL_BUILD -fPIC -DPIC
+ SHELL=/bin/sh
++OFILES=$(addsuffix .o,$(basename $(a)))
+
+ # Add -DNO_RUSAGE to the CFLAGS assignment if your system
+ # lacks getrusage().  This only matters for compiling xectim.c.
+@@ -86,7 +87,7 @@
+ .c.o:
+ 	$(CC) -c $(CFLAGS) $*.c
+
+-all: arith.h stdio1.h amplsolver.a funcadd0.o
++all: arith.h stdio1.h amplsolver.a funcadd0.o libamplsolver@sharedlibext@
+
+ a = \
+ 	asldate.c \
+@@ -189,6 +190,11 @@
+ # search path, e.g.
+ #	exec true
+ # or just comment out the ranlib invocation above.
++libamplsolver.so: $(OFILES)
++	$(CC) $^ -shared  -Wl,-soname,libamplsolver.so.0 $(LDFLAGS) -o $@.0
++	ln -s $@.0 $@
++libamplsolver.dylib: amplsolver.a
++	$(CC) -fpic -shared -Wl,-all_load amplsolver.a $(LDFLAGS) -o libamplsolver.dylib
+
+ Aslh = arith.h asl.h funcadd.h stdio1.h
+ auxinfo.o libnamsave.o: funcadd.h stdio1.h
\ No newline at end of file

From a4f0975a2cb2b46384204fd17f658046c66ac115 Mon Sep 17 00:00:00 2001
From: Grace Dinh <git@contact.dinh.ai>
Date: Tue, 23 Aug 2022 15:19:22 -0700
Subject: [PATCH 2/2]  ipopt: build with AMPL by default on darwin

---
 pkgs/development/libraries/science/math/ipopt/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/science/math/ipopt/default.nix b/pkgs/development/libraries/science/math/ipopt/default.nix
index 325a6b82a6f9..f7d4714701bc 100644
--- a/pkgs/development/libraries/science/math/ipopt/default.nix
+++ b/pkgs/development/libraries/science/math/ipopt/default.nix
@@ -5,7 +5,7 @@
 , blas
 , lapack
 , gfortran
-, enableAMPL ? stdenv.isLinux, libamplsolver
+, enableAMPL ? true, libamplsolver
 }:
 
 assert (!blas.isILP64) && (!lapack.isILP64);