Add support for libpam in RISC-V cross-compilation

Author: 12345qwert123456

Dockerfile.teleport

@@ -28,8 +28,10 @@ RUN cd web && \
 FROM --platform=linux/amd64 golang:1.25 AS go_builder
 ARG TELEPORT_VERSION
 
-RUN apt-get update && apt-get install -y \
+RUN dpkg --add-architecture riscv64 && \
+    apt-get update && apt-get install -y \
     git gcc-riscv64-linux-gnu libc6-dev-riscv64-cross \
+    libpam0g-dev:riscv64 \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /teleport
@@ -42,7 +44,7 @@ COPY --from=webassets_builder /teleport/webassets/teleport ./webassets/teleport
 # Cross-compile with CGO via riscv64-linux-gnu-gcc (no source patches)
 RUN CC=riscv64-linux-gnu-gcc \
     CGO_ENABLED=1 GOOS=linux GOARCH=riscv64 \
-    go build -tags "webassets_embed" -ldflags '-w -s' -trimpath \
+    go build -tags "webassets_embed pam" -ldflags '-w -s' -trimpath \
         -o build/teleport ./tool/teleport && \
     CC=riscv64-linux-gnu-gcc \
     CGO_ENABLED=1 GOOS=linux GOARCH=riscv64 \