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-rw-r--r--Modules/FortranCInterface/CMakeLists.txt13
1 files changed, 13 insertions, 0 deletions
diff --git a/Modules/FortranCInterface/CMakeLists.txt b/Modules/FortranCInterface/CMakeLists.txt
index 13e4498..ce0bc10 100644
--- a/Modules/FortranCInterface/CMakeLists.txt
+++ b/Modules/FortranCInterface/CMakeLists.txt
@@ -102,6 +102,19 @@ set_property(TARGET symbols PROPERTY POSITION_INDEPENDENT_CODE 1)
add_executable(FortranCInterface main.F call_sub.f ${call_mod})
target_link_libraries(FortranCInterface PUBLIC symbols)
+# If IPO is enabled here, GCC gfortran >= 12.0 will obfuscate
+# the strings of the return values in the compiled executable,
+# which we use to regex match against later.
+# The static libraries must be build with IPO and non-IPO objects,
+# as that will ensure the verify step will operate on IPO objects,
+# if requested by the system compiler flags.
+if(CMAKE_Fortran_COMPILER_ID STREQUAL "GNU" AND
+ CMAKE_Fortran_COMPILER_VERSION VERSION_GREATER_EQUAL 12)
+ target_compile_options(FortranCInterface PRIVATE "-fno-lto")
+ target_compile_options(myfort PRIVATE "-flto=auto" "-ffat-lto-objects")
+ target_compile_options(symbols PRIVATE "-flto=auto" "-ffat-lto-objects")
+endif()
+
file(GENERATE OUTPUT exe-$<CONFIG>.cmake CONTENT [[
set(FortranCInterface_EXE "$<TARGET_FILE:FortranCInterface>")
]])