updated build system

docker/aarch64/alpine

@@ -1,11 +1,12 @@
 #comment
-FROM         arm64v8/alpine:3.22.2
+FROM         arm64v8/alpine:3.23
 MAINTAINER   Scott E. Graves <scott.e.graves@protonmail.com>
 CMD          bash
 
 RUN apk update
 RUN apk upgrade
 RUN apk add \
+  7zip \
   autoconf \
   automake \
   bash \

docker/x86_64/alpine

@@ -1,11 +1,12 @@
 #comment
-FROM         alpine:3.22.2
+FROM         alpine:3.23
 MAINTAINER   Scott E. Graves <scott.e.graves@protonmail.com>
 CMD          bash
 
 RUN apk update
 RUN apk upgrade
 RUN apk add \
+  7zip \
   autoconf \
   automake \
   bash \

docker/x86_64/flutter

@@ -1,3 +1,4 @@
+#comment
 FROM debian:latest
 
 ARG UID=0

docker/x86_64/mingw64

@@ -1,16 +1,17 @@
 #comment
-FROM alpine:3.22.2
+FROM alpine:3.23
 
 RUN apk update
 RUN apk upgrade
 RUN apk add \
+  7zip \
   autoconf \
   automake \
   bash \
   binutils \
   bison \
   bzip2 \
-  clang17-extra-tools \
+  clang21-extra-tools \
   cmake \
   curl \
   file \
@@ -63,7 +64,10 @@ ENV MY_MINGW_PREFIX=${MINGW_PREFIX}
 ARG NUM_JOBS=2
 ENV MY_NUM_JOBS=${NUM_JOBS}
 
-ARG CXX_STANDARD=20
+ARG C_STANDARD=11
+ENV MY_C_STANDARD=${C_STANDARD}
+
+ARG CXX_STANDARD=23
 ENV MY_CXX_STANDARD=${CXX_STANDARD}
 
 ARG TOOLCHAIN_FILE_CMAKE=/cmake_toolchain.cmake
@@ -259,6 +263,7 @@ RUN cd /3rd_party/mingw64 && sha256sum -c ./pkg-config-${MY_PKG_CONFIG_VERSION}.
     && tar xvzf /3rd_party/mingw64/pkg-config-${MY_PKG_CONFIG_VERSION}.tar.gz \
     && cd pkg-config-${MY_PKG_CONFIG_VERSION} \
     && ./configure \
+        CFLAGS='-std=gnu11' \
         --disable-nls \
         --disable-shared \
         --prefix=/usr/local \
@@ -273,7 +278,7 @@ RUN python3 -m pip install --break-system-packages -U mako
 RUN python3 -m pip install --break-system-packages -U meson
 RUN python3 -m pip install --break-system-packages -U packaging
 
-ENV CXXFLAGS="-std=gnu++20"
+ENV CXXFLAGS="-std=gnu++${MY_CXX_STANDARD}"
 ENV LDFLAGS="-L${MY_MINGW_DIR}/lib -L${MY_MINGW_DIR}/lib64"
 ENV PATH="${MY_MINGW_DIR}/bin:/usr/local/bin:${PATH}"
 ENV PKG_CONFIG_PATH="${MY_MINGW_DIR}/lib/pkgconfig:${MY_MINGW_DIR}/lib64/pkgconfig"