use macro bcond to select BuildRequires clang/gcc

use BuildRequires clang19 by default
* allow to select BuildRequires gcc only for tumbleweed since
  for leap build doesn't work

deno.changes

@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Tue Nov 18 13:12:51 UTC 2025 - Giacomo Comes <gcomes.obs@gmail.com>
+
+- use macro bcond to select BuildRequires clang/gcc
+- use BuildRequires clang19 by default
+  * allow to select BuildRequires gcc only for tumbleweed since
+    for leap build doesn't work
+
 -------------------------------------------------------------------
 Mon Sep 15 14:53:43 UTC 2025 - Soc Virnyl Estela <uncomfyhalomacro@opensuse.org>
 

deno.spec

@@ -18,6 +18,12 @@
 #
 
 
+%bcond_without clang
+%if 0%{?suse_version} > 1600
+#uncomment next line to select gcc for tumbleweed
+#%%bcond_with clang 
+%endif
+
 %global _lto_cflags %nil
 %global _v8_version 137.2.1
 Name:           deno
@@ -31,8 +37,12 @@ Source0:        %{name}-%{version}.tar.zst
 Source1:        registry.tar.zst
 BuildRequires:  cargo-packaging
 
+%if %{with clang}
 BuildRequires:  clang19
-BuildRequires:  libstdc++6-devel-gcc14
+%else
+BuildRequires:  gcc
+BuildRequires:  gcc-c++
+%endif
 
 # needed by `libz-ng-sys` after 1.36.1
 # see: https://build.opensuse.org/package/show/devel:languages:javascript/deno#comment-1808174
@@ -112,10 +122,15 @@ export CARGO_HOME="$PWD/.cargo"
 export CLANG_VERSION=$(clang --version | grep -m1 version | sed 's/.* \([0-9]\+\).*/\1/')
 export V8_FROM_SOURCE=1
 export CLANG_BASE_PATH=%{_prefix}
+%if %{with clang}
 export CC=clang
 export CXX=clang++
 export CFLAGS="%{optflags} -Wno-unknown-warning-option"
 export CXXFLAGS="%{optflags} -Wno-unknown-warning-option"
+%else
+export CFLAGS="%{optflags}"
+export CXXFLAGS="%{optflags}"
+%endif
 
 # https://www.chromium.org/developers/gn-build-configuration
 export GN_ARGS="clang_version=${CLANG_VERSION} use_lld=true enable_nacl = false blink_symbol_level = 0 v8_symbol_level = 0"