New formula: libtommath

Closes Homebrew/homebrew#8009.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/libtommath.rb

@@ -0,0 +1,74 @@
+require 'formula'
+
+class Libtommath < Formula
+  url 'http://libtom.org/files/ltm-0.42.0.tar.bz2'
+  homepage 'http://libtom.org/?page=features&newsitems=5&whatfile=ltm'
+  md5 '7380da904b020301be7045cb3a89039b'
+
+  def patches
+    DATA # Makefile tries to install as root:wheel
+  end
+
+  def install
+    ENV['DESTDIR'] = prefix
+    system "make install"
+  end
+end
+
+__END__
+diff --git a/makefile b/makefile
+index 70de306..989e1b7 100755
+--- a/makefile
++++ b/makefile
+@@ -27,19 +27,6 @@ CFLAGS  += -fomit-frame-pointer
+
+ endif
+
+-#install as this user
+-ifndef INSTALL_GROUP
+-   GROUP=wheel
+-else
+-   GROUP=$(INSTALL_GROUP)
+-endif
+-
+-ifndef INSTALL_USER
+-   USER=root
+-else
+-   USER=$(INSTALL_USER)
+-endif
+-
+ #default files to install
+ ifndef LIBNAME
+    LIBNAME=libtommath.a
+@@ -52,10 +39,13 @@ HEADERS=tommath.h tommath_class.h tommath_superclass.h
+ #LIBPATH-The directory for libtommath to be installed to.
+ #INCPATH-The directory to install the header files for libtommath.
+ #DATAPATH-The directory to install the pdf docs.
++ifndef DESTDIR
+ DESTDIR=
+-LIBPATH=/usr/lib
+-INCPATH=/usr/include
+-DATAPATH=/usr/share/doc/libtommath/pdf
++endif
++
++LIBPATH=/lib
++INCPATH=/include
++DATAPATH=/share/doc/libtommath/pdf
+
+ OBJECTS=bncore.o bn_mp_init.o bn_mp_clear.o bn_mp_exch.o bn_mp_grow.o bn_mp_shrink.o \
+ bn_mp_clamp.o bn_mp_zero.o  bn_mp_set.o bn_mp_set_int.o bn_mp_init_size.o bn_mp_copy.o \
+@@ -113,10 +103,10 @@ profiled_single:
+        ranlib $(LIBNAME)
+
+ install: $(LIBNAME)
+-	install -d -g $(GROUP) -o $(USER) $(DESTDIR)$(LIBPATH)
+-	install -d -g $(GROUP) -o $(USER) $(DESTDIR)$(INCPATH)
+-	install -g $(GROUP) -o $(USER) $(LIBNAME) $(DESTDIR)$(LIBPATH)
+-	install -g $(GROUP) -o $(USER) $(HEADERS) $(DESTDIR)$(INCPATH)
++	install -d $(DESTDIR)$(LIBPATH)
++	install -d $(DESTDIR)$(INCPATH)
++	install $(LIBNAME) $(DESTDIR)$(LIBPATH)
++	install $(HEADERS) $(DESTDIR)$(INCPATH)
+
+ test: $(LIBNAME) demo/demo.o
+        $(CC) $(CFLAGS) demo/demo.o $(LIBNAME) -o test