Add library ICU

Author: dimztimz

bin/yaml/libraries.yaml

@@ -1057,6 +1057,15 @@ libraries:
         targets:
         - trunk
         type: github
+      icu:
+        build_type: manual
+        check_file: readme.html
+        lib_type: shared
+        repo:  unicode-org/icu
+        target_prefix: release-
+        targets:
+        - 71-1
+        type: github
       if: nightly
       immer:
         build_type: none

update_compilers/install_libraries.sh

@@ -51,6 +51,35 @@ install_openssl() {
 
 install_openssl 1_1_1c 1_1_1g
 
+#########################
+# ICU
+
+install_icu() {
+    for VERSION in "$@"; do
+        local DEST=${OPT}/libs/icu/${VERSION}/x86_64/opt
+        if [[ ! -d ${DEST} ]]; then
+            pushd /tmp
+            fetch "https://github.com/unicode-org/icu/releases/download/release-${VERSION}/icu4c-${VERSION/-/_}-src.tgz" |
+                tar zxf -
+            pushd icu/source
+            ./configure --prefix=${DEST}
+            make
+            make install
+
+            make clean
+            ./configure --prefix=${DEST/x86_64/x86} --with-library-bits=32
+            make
+            make install
+
+            popd
+            rm -rf icu
+            popd
+        fi
+    done
+}
+
+install_icu 71-1
+
 #########################
 # cs50