icu: export C API on MinGW

mingw-w64-icu/0001-Add-visibility-attributes-for-MinGW.patch

@@ -0,0 +1,45 @@
+From 0a92e43809209c210cf77a4d63a255e4093ea73f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Markus=20M=C3=BCtzel?= <markus.muetzel@gmx.de>
+Date: Fri, 6 Jun 2025 09:42:02 +0200
+Subject: [PATCH] Add visibility attributes for MinGW.
+
+---
+ source/common/unicode/platform.h | 4 ++++
+ source/config/icu.pc.in          | 1 +
+ 2 files changed, 5 insertions(+)
+
+diff --git a/source/common/unicode/platform.h b/source/common/unicode/platform.h
+index 45741a83deb..60be4987eb2 100644
+--- a/source/common/unicode/platform.h
++++ b/source/common/unicode/platform.h
+@@ -780,6 +780,8 @@
+ #elif defined(_MSC_VER) || (UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllexport__) && \
+                             UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__))
+ #   define U_EXPORT __declspec(dllexport)
++#elif defined (_WIN32) || defined (__CYGWIN__)
++#   define U_EXPORT __attribute__ ((dllexport))
+ #elif defined(__GNUC__) || defined(__open_xl__)
+ #   define U_EXPORT __attribute__((visibility("default")))
+ #elif (defined(__SUNPRO_CC) && __SUNPRO_CC >= 0x550) \
+@@ -806,6 +808,8 @@
+                             UPRV_HAS_DECLSPEC_ATTRIBUTE(__dllimport__))
+     /* Windows needs to export/import data. */
+ #   define U_IMPORT __declspec(dllimport)
++#elif defined (_WIN32) || defined (__CYGWIN__)
++#   define U_IMPORT __attribute__ ((dllimport))
+ #else
+ #   define U_IMPORT 
+ #endif
+diff --git a/source/config/icu.pc.in b/source/config/icu.pc.in
+index 4d8db206c2b..9adc2e208a1 100644
+--- a/source/config/icu.pc.in
++++ b/source/config/icu.pc.in
+@@ -33,4 +33,5 @@ ICUDESC=International Components for Unicode
+ 
+ Version: @VERSION@
+ Cflags: -I${includedir}
++Cflags.private: -DU_STATIC_IMPLEMENTATION
+ # end of icu.pc.in
+-- 
+2.47.1.windows.2
+

mingw-w64-icu/PKGBUILD

@@ -6,7 +6,7 @@ _realname=icu
 pkgbase=mingw-w64-${_realname}
 pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}")
 pkgver=77.1
-pkgrel=1
+pkgrel=2
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
 pkgdesc="International Components for Unicode library (mingw-w64)"
@@ -21,7 +21,8 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
              "${MINGW_PACKAGE_PREFIX}-autotools"
              "autoconf-archive")
 source=(https://github.com/unicode-org/icu/releases/download/release-${pkgver//./-}/icu4c-${pkgver//./_}-src.tgz
-        https://sources.debian.org/data/main/i/icu/76.1-3/debian/patches/reverse_of_ICU-22610.patch
+        https://sources.debian.org/data/main/i/icu/76.1-4/debian/patches/reverse_of_ICU-22610.patch
+        0001-Add-visibility-attributes-for-MinGW.patch
         0011-sbin-dir.mingw.patch
         0012-libprefix.mingw.patch
         0014-mingwize-pkgdata.mingw.patch
@@ -31,6 +32,7 @@ source=(https://github.com/unicode-org/icu/releases/download/release-${pkgver//.
         0023-fix-twice-include-platform_make_fragment.patch)
 sha256sums=('588e431f77327c39031ffbb8843c0e3bc122c211374485fa87dc5f3faff24061'
             'c515e2b37e230895080d36207dfe078eb638f974220baa487ede2593e820944c'
+            '6537454d4f94bb25fb61aec2d9138d443cbba49122e64f0be154f92d739085f7'
             '4f4787caeccf70607cf0cbde0c005f05f5c6de1543265a927839122405b4054f'
             'e7ecdafe85e18a4a4b5f29bbfde38776521a848e5b65089a2379b90e59f1592d'
             'd9f5f756443d7d14175aca06f4f1bb33237b58907e5db7a6ff7e38d2c4ea7957'
@@ -54,6 +56,7 @@ prepare() {
 
   apply_patch_with_msg \
     reverse_of_ICU-22610.patch \
+    0001-Add-visibility-attributes-for-MinGW.patch \
     0011-sbin-dir.mingw.patch \
     0012-libprefix.mingw.patch \
     0014-mingwize-pkgdata.mingw.patch \