icu-devel: sync with main port

devel/icu-devel/Portfile

@@ -25,7 +25,7 @@ set my_name         icu
 #  port file all | sort -u | xargs grep -El ':icu( |$)' | rev | cut -d / -f 2 | rev | xargs port info --name --subport | cut -d : -f 2 | tr ',' ' ' | grep -v '\-\-' | tr ' ' '\n' | sort -u
 
 github.setup        unicode-org ${my_name} 78.3 release-
-revision            0
+revision            1
 epoch               1
 subport             ${name}-docs         { revision 0 }
 subport             ${name}-lx           { revision 0 }
@@ -62,7 +62,7 @@ if {${subport} eq ${name} || ${subport} eq "${name}-lx"} {
         merger_must_run_binaries yes
     }
 
-    distname            icu4c-[string map {.rc rc} ${version}]-sources
+    distname            icu4c-${version}-sources
     extract.suffix      .tgz
     worksrcdir          icu/source
 
@@ -73,6 +73,8 @@ if {${subport} eq ${name} || ${subport} eq "${name}-lx"} {
 
     # fix rpath mess
     patchfiles-append patch-config-mh-darwin.diff
+    patchfiles-append   platform.h.patch \
+                        abs.patch
 
     compiler.cxx_standard   2017
 
@@ -193,7 +195,7 @@ if {${subport} eq "${name}-docs"} {
     long_description-append Documentation.
 
     use_zip                 yes
-    distname                icu4c-[string map {.rc rc} ${version}]-docs
+    distname                icu4c-${version}-docs
     checksums               rmd160  a2e3cbf0b532e7bb3c5e21a66eb70bf5124ceae4 \
                             sha256  7d7a502c881bb744531c3526dc02ffb18a1960caadb129c67818cc72d97c6bb1 \
                             size    10664785

devel/icu-devel/files/abs.patch

@@ -0,0 +1,22 @@
+Fix abs() ambiguity.
+https://trac.macports.org/ticket/73705
+
+--- i18n/measunit_extra.cpp.orig	2026-03-18 04:44:50
++++ i18n/measunit_extra.cpp	2026-03-23 07:51:52
+@@ -33,6 +33,7 @@
+ #include "util.h"
+ #include <limits.h>
+ #include <cstdlib>
++#include <cmath>
+ U_NAMESPACE_BEGIN
+ 
+ 
+@@ -686,7 +687,7 @@ class Token { (public)
+         // Check if the value is integer.
+         uint64_t int_result = static_cast<uint64_t>(double_result);
+         const double kTolerance = 1e-9;
+-        if (abs(double_result - int_result) > kTolerance) {
++        if (std::abs(double_result - int_result) > kTolerance) {
+             status = kUnitIdentifierSyntaxError;
+             return 0;
+         }

devel/icu-devel/files/platform.h.patch

@@ -0,0 +1,16 @@
+Work around bug in old clang versions that had __has_cpp_attribute defined even
+in C mode.
+
+https://discourse.llvm.org/t/possible-bug-with-has-cpp-attribute/36508/4
+https://bugs.llvm.org/show_bug.cgi?id=23435
+--- common/unicode/platform.h.orig	2026-03-17 12:44:50.000000000 -0500
++++ common/unicode/platform.h	2026-03-22 14:39:11.000000000 -0500
+@@ -388,7 +388,7 @@
+ #else
+ #   define UPRV_HAS_ATTRIBUTE(x) 0
+ #endif
+-#ifdef __has_cpp_attribute
++#if defined(__cplusplus) && defined(__has_cpp_attribute)
+ #   define UPRV_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+ #else
+ #   define UPRV_HAS_CPP_ATTRIBUTE(x) 0