configure: Error out if failing to download libzstd or libb2

diff --git a/configure.ac b/configure.ac
index bf00677fb1528cd65ee39f5530b8f5a789c93920..36b9b29e9e8baed65ce6fc08cc4c52aeaded22db 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -166,6 +166,9 @@ else
             fi
         fi
     fi
+    if ! test -f $zstd_archive; then
+        AC_MSG_ERROR(failed to download $zstd_url)
+    fi
     (cd src/third_party && tar -xzf ../../${zstd_archive})
     rm -rf src/third_party/zstd
     mv src/third_party/zstd-${zstd_version} src/third_party/zstd
@@ -203,6 +206,9 @@ else
             fi
         fi
     fi
+    if ! test -f $libb2_archive; then
+        AC_MSG_ERROR(failed to download $libb2_url)
+    fi
     (cd src/third_party && tar -xzf ../../${libb2_archive})
     rm -rf src/third_party/libb2
     mv src/third_party/libb2-${libb2_version} src/third_party/libb2