disable jemalloc through cmake, not through ci script

.github/workflows/NightlyTests.yml

@@ -201,7 +201,7 @@ jobs:
         shell: bash
         run: |
           mkdir -p build/release
-          (cd build/release && cmake -G "Ninja" -DSTATIC_LIBCPP=1 -DBUILD_EXTENSIONS='icu;parquet;fts;json' -DFORCE_32_BIT=1 -DSKIP_EXTENSIONS="jemalloc" -DCMAKE_BUILD_TYPE=Release ../.. && cmake --build .)
+          (cd build/release && cmake -G "Ninja" -DSTATIC_LIBCPP=1 -DBUILD_EXTENSIONS='icu;parquet;fts;json' -DFORCE_32_BIT=1 -DCMAKE_BUILD_TYPE=Release ../.. && cmake --build .)
 
       - name: Test
         shell: bash

extension/extension_config.cmake

@@ -11,7 +11,9 @@
 duckdb_extension_load(parquet)
 
 # The Linux allocator has issues so we use jemalloc, but only on x86 because page sizes are fixed at 4KB.
+# Configuring jemalloc properly for 32bit is a hassle, and not worth it so we only enable on 64bit
 # If page sizes vary for an architecture (e.g., arm64), we cannot create a portable binary due to jemalloc config
-if(OS_NAME STREQUAL "linux" AND (OS_ARCH STREQUAL "amd64" OR OS_ARCH STREQUAL "i386") AND NOT WASM_LOADABLE_EXTENSIONS AND NOT CLANG_TIDY AND NOT ANDROID AND NOT ZOS)
+# FIXME: after configuring the jemalloc config, jemalloc should work on arm64 again (should try at some point)
+if(CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT FORCE_32_BIT AND OS_NAME STREQUAL "linux" AND (OS_ARCH STREQUAL "amd64" OR OS_ARCH STREQUAL "i386") AND NOT WASM_LOADABLE_EXTENSIONS AND NOT CLANG_TIDY AND NOT ANDROID AND NOT ZOS)
     duckdb_extension_load(jemalloc)
 endif()

src/common/allocator.cpp

@@ -17,7 +17,8 @@
 #endif
 
 #ifndef USE_JEMALLOC
-#if defined(DUCKDB_EXTENSION_JEMALLOC_LINKED) && DUCKDB_EXTENSION_JEMALLOC_LINKED && !defined(WIN32)
+#if defined(DUCKDB_EXTENSION_JEMALLOC_LINKED) && DUCKDB_EXTENSION_JEMALLOC_LINKED && !defined(WIN32) &&                \
+    INTPTR_MAX == INT64_MAX
 #define USE_JEMALLOC
 #endif
 #endif