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Enable -O0 and runtime diagnostics in DEBUG build for ICON #138

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Enable -O0 and runtime diagnostics in DEBUG build for ICON #138

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a9bb856
Add -O0 and runtime checks (bounds, uninit, FPE trap, NaN-init) to DE…
s-poll Aug 7, 2026
fd8b0c5
remove check uninit flag in ICON cmake
s-poll Aug 7, 2026
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10 changes: 8 additions & 2 deletions cmake/BuildICON.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -24,8 +24,14 @@ set(ICON_ECRAD_FCFLAGS "-D__ECRAD_LITTLE_ENDIAN")

# Control compiler optimization depending on CMAKE_BUILD_TYPE
if (CMAKE_BUILD_TYPE STREQUAL "DEBUG")
string(PREPEND ICON_CFLAGS "-g ")
string(PREPEND ICON_FCFLAGS "-g ")
string(PREPEND ICON_CFLAGS "-O0 -g ")
string(PREPEND ICON_FCFLAGS "-O0 -g ")
# Runtime diagnostics: bounds checking, trap FP exceptions, uninitialized reals with NaN
if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel" OR CMAKE_Fortran_COMPILER_ID STREQUAL "IntelLLVM")
string(APPEND ICON_FCFLAGS " -check bounds -fpe0 -init=snan")
elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
string(APPEND ICON_FCFLAGS " -fcheck=bounds -ffpe-trap=invalid,zero,overflow -finit-real=snan")
endif()
elseif (CMAKE_BUILD_TYPE STREQUAL "RELEASE")
string(PREPEND ICON_CFLAGS "-O2 ")
string(PREPEND ICON_FCFLAGS "-O2 ")
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