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[embedded] Build the _Builtin_float overlay in embedded Swift mode #80951

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Merged
merged 1 commit into from
Apr 22, 2025
+54 −3
Merged

[embedded] Build the _Builtin_float overlay in embedded Swift mode #80951

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55 changes: 53 additions & 2 deletions stdlib/public/ClangOverlays/CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -1,4 +1,12 @@
if(NOT DEFINED SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT OR NOT SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT)
set(BUILTIN_FLOAT_SOURCES
linker-support/magic-symbols-for-install-name.c
)

set(BUILTIN_FLOAT_GYB_SOURCES
float.swift.gyb
)

if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
set(BUILTIN_FLOAT_SWIFT_FLAGS -Xfrontend -module-abi-name -Xfrontend Darwin)
else()
Expand All @@ -9,10 +17,10 @@ if(NOT DEFINED SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT OR NOT SWIFT_BUILD_
${SWIFT_STDLIB_LIBRARY_BUILD_TYPES}
IS_SDK_OVERLAY

linker-support/magic-symbols-for-install-name.c
${BUILTIN_FLOAT_SOURCES}

GYB_SOURCES
float.swift.gyb
${BUILTIN_FLOAT_GYB_SOURCES}

SWIFT_COMPILE_FLAGS
${SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS}
Expand All @@ -24,4 +32,47 @@ if(NOT DEFINED SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT OR NOT SWIFT_BUILD_

INSTALL_IN_COMPONENT stdlib
MACCATALYST_BUILD_FLAVOR zippered)

# Embedded clang overlays - embedded libraries are built as .swiftmodule only,
# i.e. there is no .o or .a file produced (no binary code is actually produced)
# and only users of a library are going to actually compile any needed code.
if(SWIFT_SHOULD_BUILD_EMBEDDED_STDLIB)
add_custom_target(embedded-builtin_float)
add_dependencies(embedded-libraries embedded-builtin_float)

foreach(entry ${EMBEDDED_STDLIB_TARGET_TRIPLES})
string(REGEX REPLACE "[ \t]+" ";" list "${entry}")
list(GET list 0 arch)
list(GET list 1 mod)
list(GET list 2 triple)

set(SWIFT_SDK_embedded_ARCH_${arch}_MODULE "${mod}")
set(SWIFT_SDK_embedded_LIB_SUBDIR "embedded")
set(SWIFT_SDK_embedded_ARCH_${arch}_TRIPLE "${triple}")
set(SWIFT_SDK_embedded_PATH ${SWIFT_SDK_OSX_PATH})
set(SWIFT_SDK_embedded_ARCH_${arch}_PATH ${SWIFT_SDK_OSX_PATH})
set(SWIFT_SDK_embedded_USE_ISYSROOT TRUE)
add_swift_target_library_single(
embedded-builtin_float-${mod}
swift_Builtin_float
ONLY_SWIFTMODULE
IS_FRAGILE

${BUILTIN_FLOAT_SOURCES}
GYB_SOURCES
${BUILTIN_FLOAT_GYB_SOURCES}

SWIFT_COMPILE_FLAGS
${BUILTIN_FLOAT_SWIFT_FLAGS}
-Xcc -ffreestanding -enable-experimental-feature Embedded

MODULE_DIR "${CMAKE_BINARY_DIR}/lib/swift/embedded"
SDK "embedded"
ARCHITECTURE "${arch}"
DEPENDS embedded-stdlib-${mod}
INSTALL_IN_COMPONENT stdlib
)
add_dependencies(embedded-builtin_float embedded-builtin_float-${mod})
endforeach()
endif()
endif()
2 changes: 1 addition & 1 deletion stdlib/public/ClangOverlays/float.swift.gyb
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ public let FLT_RADIX = Double.radix

%for type, prefix in [('Float', 'FLT'), ('Double', 'DBL'), ('Float80', 'LDBL')]:
% if type == "Float80":
#if !os(Android) && !os(WASI) && !os(Windows) && (arch(i386) || arch(x86_64))
#if !os(Android) && !os(WASI) && !os(Windows) && !$Embedded && (arch(i386) || arch(x86_64))
% end
// Where does the 1 come from? C counts the usually-implicit leading
// significand bit, but Swift does not. Neither is really right or wrong.
Expand Down