build: workaround for 'realpath' missing on macOS

contrib/build_tools_util.sh

@@ -107,6 +107,12 @@ function host_strip()
     fi
 }
 
+# on MacOS, there is no realpath by default
+if ! [ -x "$(command -v realpath)" ]; then
+    function realpath() {
+        [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
+    }
+fi
 
 
 export SOURCE_DATE_EPOCH=1530212462

contrib/make_libsecp256k1.sh

@@ -4,12 +4,12 @@ LIBSECP_VERSION="b408c6a8b287003d1ade5709e6f7bc3c7f1d5be7"
 
 set -e
 
+. $(dirname "$0")/build_tools_util.sh || (echo "Could not source build_tools_util.sh" && exit 1)
+
 here=$(dirname $(realpath "$0" 2> /dev/null || grealpath "$0"))
 CONTRIB="$here"
 PROJECT_ROOT="$CONTRIB/.."
 
-. "$here"/build_tools_util.sh || (echo "Could not source build_tools_util.sh" && exit 1)
-
 pkgname="secp256k1"
 info "Building $pkgname..."
 

contrib/osx/base.sh

@@ -21,7 +21,3 @@ function DoCodeSignMaybe { # ARGS: infoName fileOrDirName codesignIdentity
     info "Code signing ${infoName}..."
     codesign -f -v $deep -s "$identity" "$file" || fail "Could not code sign ${infoName}"
 }
-
-function realpath() {
-    [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
-}