size-sensitive curl build script for msys2 mingw

build-curl.sh

#!/bin/bash
# workaround for static zlib
test -e /mingw64/lib/libz.dll.a && mv -f /mingw64/lib/libz.dll.a /mingw64/lib/_libz.dll.a
test -e /mingw32/lib/libz.dll.a && mv -f /mingw32/lib/libz.dll.a /mingw32/lib/_libz.dll.a
set -e
# git clone https://github.com/curl/curl --depth=1 && cd curl
CURL_VER='7.61.1'
# CURL_VER="$(curl -s --retry 10 --retry-connrefused --retry-delay 1 'https://curl.haxx.se/docs/releases.csv' | cut -f2 -d';' | sort -ruV | head -1)"
wget -c https://curl.haxx.se/download/curl-${CURL_VER}.tar.xz
tar xf curl-${CURL_VER}.tar.xz
cd curl-${CURL_VER}
mkdir build
cd build
cmake -GNinja .. \
    -DCMAKE_USE_WINSSL=ON \
    -DCMAKE_USE_LIBSSH2=OFF \
    -DBUILD_SHARED_LIBS=OFF \
    -DBUILD_TESTING=OFF \
    -DENABLE_MANUAL=OFF \
    -DCMAKE_C_FLAGS='-pipe -Wl,--gc-sections,--build-id=none -Os -fmerge-all-constants -fno-asynchronous-unwind-tables' 
ninja
# ~500k stripped curl.exe in my local mingw64 gcc 8.2.0 and binutils 2.31.1
strip -s src/curl.exe
cd ../..
set +e
test -e /mingw64/lib/_libz.dll.a && mv -f /mingw64/lib/_libz.dll.a /mingw64/lib/libz.dll.a
test -e /mingw32/lib/_libz.dll.a && mv -f /mingw32/lib/_libz.dll.a /mingw32/lib/libz.dll.a