🐛 Fix benchmarks on GCC

Problem:
- Benchmarks are using unknown command line options for GCC.
- GCC cannot perform CTAD on pseudo-pext benchmark inputs properly.

Solution:
- The equivalent of Clang's `-fconstexpr-steps` is GCC's
  `-fconstexpr-ops-limit`.
- Supply pseudo-pext benchmark inputs with explicit template arguments.

Author: elbeno

benchmark/lookup/CMakeLists.txt

@@ -91,8 +91,12 @@ function(gen_pp_benchmarks)
             cib_lookup
             mph
             frozen-headers)
-        target_compile_options(${name} PRIVATE -fconstexpr-steps=4000000000
-                                               --include=${HEADER})
+        target_compile_options(
+            ${name}
+            PRIVATE
+                $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-fconstexpr-steps=4000000000>
+                $<$<CXX_COMPILER_ID:GNU>:-fconstexpr-ops-limit=4000000000>
+                --include=${HEADER})
         target_compile_definitions(
             ${name} PRIVATE ALG_NAME=bench_${ALG_NAME} DATASET=${DATASET}
                             ANKERL_NANOBENCH_IMPLEMENT)

benchmark/lookup/algorithms/pseudo_pext.hpp

@@ -26,7 +26,7 @@ template <auto data, typename T, bool indirect = true,
           std::size_t max_search_len = 2>
 constexpr auto make_pseudo_pext() {
     return lookup::pseudo_pext_lookup<indirect, max_search_len>::make(
-        CX_VALUE(lookup::input{0, pp::input_data<data, T>}));
+        CX_VALUE(lookup::input<T, T, data.size()>{0, pp::input_data<data, T>}));
 }
 
 template <auto data, typename T, bool indirect = true,

benchmark/msg/CMakeLists.txt

@@ -1,3 +1,8 @@
 add_benchmark(handler_bench NANO FILES handler_bench.cpp SYSTEM_LIBRARIES cib)
-target_compile_options(handler_bench PRIVATE -fconstexpr-steps=4000000000
-                                             -fbracket-depth=1024)
+target_compile_options(
+    handler_bench
+    PRIVATE
+        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-fconstexpr-steps=4000000000>
+        $<$<CXX_COMPILER_ID:GNU>:-fconstexpr-ops-limit=4000000000>
+        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-fbracket-depth=1024>
+)