FFI: add ghc libffi for other cryptol executables

.github/ci.sh

@@ -33,6 +33,16 @@ extract_exe() {
   $IS_WIN || chmod +x "$2/$name"
 }
 
+extract_libffi() {
+  libffi=("$(ghc --print-libdir)"/rts/libffi.*)
+  mkdir -p "$1"
+  cp "${libffi[@]}" "$1"
+}
+
+extract_libffi_for_bin() {
+  extract_libffi "$(dirname "$(cabal v2-exec which "$1$EXT")")/../lib"
+}
+
 retry() {
   echo "Attempting with retry:" "$@"
   local n=1
@@ -61,11 +71,11 @@ setup_dist_bins() {
 }
 
 setup_libffi() {
-  libffi=("$(ghc --print-libdir)"/rts/libffi.*)
-  build_lib="$(dirname "$(cabal v2-exec which cryptol)")/../lib"
-  mkdir -p dist/lib "$build_lib"
-  cp "${libffi[@]}" dist/lib
-  cp "${libffi[@]}" "$build_lib"
+  extract_libffi "dist/lib"
+  extract_libffi_for_bin "cryptol"
+  extract_libffi_for_bin "cryptol-html"
+  extract_libffi_for_bin "cryptol-remote-api"
+  extract_libffi_for_bin "cryptol-eval-server"
 }
 
 build() {

cryptol-remote-api/cryptol-remote-api.cabal

@@ -100,6 +100,9 @@ executable cryptol-remote-api
   if os(linux) && flag(static)
       ld-options:      -static -pthread
 
+  if os(linux) && flag(ffi)
+      ld-options:      -Wl,-rpath,$ORIGIN/../lib
+
 executable cryptol-eval-server
   import:              deps, warnings, errors
   main-is:             Main.hs
@@ -117,4 +120,6 @@ executable cryptol-eval-server
   if os(linux) && flag(static)
       ld-options:      -static -pthread
 
+  if os(linux) && flag(ffi)
+      ld-options:      -Wl,-rpath,$ORIGIN/../lib
 

cryptol.cabal

@@ -279,6 +279,9 @@ executable cryptol-html
       ld-options: -static -pthread
       ghc-options: -optl-fuse-ld=bfd
 
+  if os(linux) && flag(ffi)
+      ld-options: -Wl,-rpath,$ORIGIN/../lib
+
 executable check-exercises
   Default-language:
     Haskell2010