add lowmem bcond for reducing memory requirements during build

diff --git a/llvm.spec b/llvm.spec
index 4c02a831151c81ce9490d7a103929c143ab0d57f..e12be7e8fff48a96ffb080e7150d5a3c1f92d868 100644 (file)
--- a/llvm.spec
+++ b/llvm.spec
@@ -23,6 +23,7 @@
 %bcond_with    cxxmodules      # C++20 modules (requires support in bootstrap compiler)
 %bcond_with    apidocs         # doxygen docs (HUGE, so they are not built by default)
 %bcond_with    tests           # run tests
+%bcond_with    lowmem          # lower memory requirements
 
 # No ocaml on other arches or no native ocaml (required for ocaml-ctypes)
 %ifnarch %{ix86} %{x8664} %{arm} aarch64 ppc sparc sparcv9
@@ -33,6 +34,10 @@
 %undefine      with_rt
 %endif
 
+%ifarch %{arm} aarch64
+%define                lowmem          1
+%endif
+
 Summary:       The Low Level Virtual Machine (An Optimizing Compiler Infrastructure)
 Summary(pl.UTF-8):     Niskopoziomowa maszyna wirtualna (infrastruktura kompilatora optymalizującego)
 Name:          llvm
@@ -574,6 +579,12 @@ install -d build
 cd build
 CPPFLAGS="%{rpmcppflags} -D_FILE_OFFSET_BITS=64"
 
+%if %{with lowmem}
+export CFLAGS="%{rpmcflags} -g0"
+export CXXFLAGS="%{rpmcxxflags} -g0"
+export LDFLAGS="%{rpmldflags} -Wl,--reduce-memory-overheads"
+%endif
+
 %cmake .. \
        -DBUILD_SHARED_LIBS:BOOL=OFF \
        -DENABLE_LINKER_BUILD_ID:BOOL=ON \
@@ -600,6 +611,9 @@ CPPFLAGS="%{rpmcppflags} -D_FILE_OFFSET_BITS=64"
 %endif
        -DLLVM_LINK_LLVM_DYLIB:BOOL=ON \
        -DLLVM_DEFAULT_TARGET_TRIPLE:STRING=%{_target_platform} \
+%if %{with lowmem}
+       -DLLVM_PARALLEL_LINK_JOBS:STRING=1 \
+%endif
        -DSPHINX_WARNINGS_AS_ERRORS=OFF
 
 %{__make} \