tesseract: depend on libtiff, fix building --with-opencl

Resolves #10380

Closes #10596.

Signed-off-by: JCount <JCount42@gmail.com>

Formula/tesseract.rb

@@ -3,6 +3,7 @@ class Tesseract < Formula
   homepage "https://github.com/tesseract-ocr/"
   url "https://github.com/tesseract-ocr/tesseract/archive/3.05.00.tar.gz"
   sha256 "3fe83e06d0f73b39f6e92ed9fc7ccba3ef734877b76aa5ddaaa778fac095d996"
+  revision 1
 
   bottle do
     sha256 "d2ec7a1ef8859c28dd0d1e2e5a4bf54224bf971e11863bef693687fb3f166180" => :sierra
@@ -31,7 +32,7 @@ class Tesseract < Formula
   depends_on "pkg-config" => :build
 
   depends_on "leptonica"
-  depends_on "libtiff" => :recommended
+  depends_on "libtiff"
 
   if build.with? "training-tools"
     depends_on "libtool" => :build
@@ -64,6 +65,14 @@ class Tesseract < Formula
     sha256 "36f772980ff17c66a767f584a0d80bf2302a1afa585c01a226c1863afcea1392"
   end
 
+  # remove on next release, > 3.05.00
+  # upstream fix for building with OpenCL enabled
+  # https://github.com/tesseract-ocr/tesseract/pull/814
+  patch do
+    url "https://github.com/tesseract-ocr/tesseract/commit/b18cad4.patch"
+    sha256 "10c59baa54c3406fcd03f36cd0f1e3cc2ba150f082d14f919274a541b3cff7b2"
+  end
+
   def install
     if build.head?
       # ld: symbol(s) not found for _clSetKernelArg and other symbols