alist/3.30.0-5: follow system c/cpp flags

packages/alist/PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname='alist'
 pkgver=3.30.0
-pkgrel=4
+pkgrel=5
 pkgdesc='A file list/WebDAV program that supports multiple storages, powered by Gin and Solidjs.'
 url="https://github.com/alist-org/alist"
 license=('AGPL-3.0-or-later')
@@ -33,9 +33,15 @@ prepare() {
 }
 
 build() {
+  export CGO_CPPFLAGS="${CPPFLAGS}"
+  export CGO_CFLAGS="${CFLAGS}"
+  export CGO_CXXFLAGS="${CXXFLAGS}"
+  export CGO_LDFLAGS="${LDFLAGS}"
+  export GOFLAGS="-v -x -work -modcacherw -trimpath -buildmode=pie -mod=readonly"
+
   cd "${srcdir}/${pkgname}-${pkgver}"
-  go build -v -x -work -trimpath -buildmode=pie -o "${srcdir}/${pkgname}" \
-    -ldflags="-w -s \
+  go build -o "${srcdir}/${pkgname}" \
+    -ldflags="-w -s -linkmode external \
       -X 'github.com/alist-org/alist/v3/internal/conf.BuiltAt=$(date +"%F %T %z")' \
       -X 'github.com/alist-org/alist/v3/internal/conf.GoVersion=$(go version | sed "s/go version //")' \
       -X 'github.com/alist-org/alist/v3/internal/conf.Version=${pkgver}'"