gmp: Ship different gmp.h per architecture for universal builds

gmp.h contains the sizeof(mp_limb_t), which is 32 bits on 32 bit architectures
and 64 bit on 64 bit architectures. nettle will fail with assertions when
mixing these, and other things probably won't work well either.

1 files changed, 37 insertions, 0 deletions

diff --git a/recipes/gmp.recipe b/recipes/gmp.recipe
index 3ea8ed01..d627285a 100644
--- a/recipes/gmp.recipe
+++ b/recipes/gmp.recipe
@@ -1,6 +1,21 @@
 # -*- Mode: Python -*- vi:si:et:sw=4:sts=4:ts=4:syntax=python
 import shutil
 
+GMP_H_UNVERSAL='''\
+#ifdef __i386__
+#include "i386/gmp.h"
+#elif defined(__ppc__)
+#include "ppc/gmp.h"
+#elif defined(__x86_64__)
+#include "x86_64/gmp.h"
+#elif defined(__arm__)
+#include "arm/gmp.h"
+#elif defined(__arm64__)
+#include "arm64/gmp.h"
+#else
+#error "Unsupported Architecture"
+#endif
+'''
 
 class Recipe(recipe.Recipe):
     name = 'gmp'
@@ -22,6 +37,9 @@ class Recipe(recipe.Recipe):
         elif self.config.target_platform == Platform.IOS:
             self.configure_options = ' --disable-assembly'
 
+        if self.config.target_platform in [Platform.DARWIN, Platform.IOS]:
+            self.files_devel.append(os.path.join('include', '*', 'gmp.h'))
+
     def post_install(self):
         if self.config.target_platform == Platform.WINDOWS:
             src = os.path.join(self.config.prefix, 'lib', 'libgmp-10.dll')
@@ -33,3 +51,22 @@ class Recipe(recipe.Recipe):
             shutil.copy(src, dll_a)
             gmp_la = os.path.join(self.config.prefix, 'lib', 'libgmp.la')
             shell.replace(gmp_la, {'libgmp.lib': 'libgmp.dll.a'})
+        elif self.config.target_platform in [Platform.DARWIN, Platform.IOS]:
+            # For the universal build we need to ship gmp.h of both
+            # architectures in a subfolder and include the correct one depending
+            # on the compiler architecture
+            arch = self.config.target_arch
+            if arch == Architecture.X86:
+                arch = 'i386'
+            elif arch == Architecture.ARM64:
+                arch = 'arm64'
+            elif Architecture.is_arm(arch):
+                arch = 'arm'
+
+            arch_dir = os.path.join(self.config.prefix, 'include', arch)
+            if not os.path.exists(arch_dir):
+                os.makedirs(arch_dir)
+            shutil.copyfile(os.path.join(self.build_dir, 'gmp.h'),
+                        os.path.join(arch_dir, 'gmp.h'))
+            with open(os.path.join(self.config.prefix, 'include', 'gmp.h'), 'w+') as f:
+                f.write(GMP_H_UNVERSAL)