EDK II Build Specification
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1.0.0
Appendix K Third Party Tool Flags
The following tables provide a summary of these "Best Known" options.
Note: A reserved keyword,
MDEPKG_NDEBUG, can be used for code size reduction purposes.Table 24 Standard C File Compiler Options
Microsoft
Intel
GCC
Description
/nologo/nologo​
Do not display compiler version information
/c/c-cCompile C files to object (.obj) files only, do not link
/WX/WX-WerrorForce warnings to be reported as errors.
/GS-/GS-​
Disable security checks
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-Wno-missing-bracesWarn if an aggregate or union initializer is not fully bracketed. In the following example, the initializer for 'a' is not fully bracketed, but that for 'b' is fully bracketed.
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-Wno-array-boundsDisables warnings if subscripts to arrays are out of bounds.
/W4/W4-WallWarning level 4 - print errors, warnings and remarks (or enable most warning messages)
/Gs32768​
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Control stack (32768 bytes) checking calls
/Gy/Gy​
Separate functions for linker.
/O1ib2/O1​
Optimize for minimum space, enable intrinsic functions, enable in-line expansion.
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/Oi​
Enable Intrinsic functions
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/Ob2-default-inlineIn-line any function, at the compiler's discretion (same as
/Qip)​
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-OOptimize output file
/GL​
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Enable link-time code generation
/EHs-c-​
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Combine
/EHs- and /EHc-​
/EHs-​
Disable C++ EH (no SHE exceptions)
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/EHc-​
Disable extern C defaults to no throw
/GFGF​
Enable read-only string pooling
/GR-​
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Disable C++ RTTI
EDK II Specific Flags
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/D UNICODE/D UNICODE-DUNICODEdefine macro UNICODE
/FIAutoGen.h/FIAutoGen.h--include AutoGen.hAlways include AutoGen.h file
Debug Specific Flags
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/Zi/Zi-gEnable debugging information
/Gm/Gm​
Enable minimum rebuild
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-fshort-wcharForce the underlying type for "wchar_t" to be "unsigned short"
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-fno-stack-protector​
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-fno-strict-aliasing​
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-ffunction-sections​
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-fdata-sections​
IPF Specific Flags
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/Ox​
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Maximum Optimization (
/Ogityb2 /Gs)/X​
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ignore standard places
/QIPF_fr32​
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Do not use upper 96 Floating Point Registers
/Zx​
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Generates debug-able optimized code. Only available in the IPF cross compiler or IPF native compiler.
Table 25 Assembly Flags
Microsoft
GCC
Description
/nologo​
Do not display assembler version information
/c-cGenerate object (.obj) files, do not link
/WX​
Treat warnings as errors
/W3​
Warning level 3
/Cx​
Preserve case in publics and externs
/coff​
Generate COFF format object files
/Zd​
Add line number debug info
/Zi​
Add symbolic debug info (DEBUG target)
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-x assemblerInput files are in assembly language
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-imacros AutoGen.hAccept definition of macros in AutoGen.h
Table 26 C Compiler's Preprocessor Options
Microsoft
Intel
GCC
Description
/nologo/nologo​
Do not display compiler version information
/E/E-EPreprocess only; do not compile, assemble or link
/TC/TC-x assembler-with-cppCompile as .c files
/FIAutoGen.h/FIAutoGen.h--include AutoGen.hAlways include AutoGen.h file
Table 27 C Compiler's Preprocessor Options for VFR files ONLY
Microsoft
Intel
GCC
Description
/nologo/nologo​
Do not display compiler version information
/E/E-EPreprocess only; do not compile, assemble or link
/TC/TC-x cCompile as .c files
/D VFRCOMPILE/D VFRCOMPILE-DVFRCOMPILEUsed only for Preprocessing VFR files
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-PUsed only for Preprocessing VFR files - do not generate #line directives
/FI$(MOD_NAME)StrDefs.h​
​
Force include of the module's StrDefs.h file.
Table 28 Pre-compiled Header (PCH) Creation Flags
Microsoft
Intel
GCC
Description
/nologo/nologo​
Do not display compiler version information
/c/c-cCompile C files to object (.obj) files only, do not link
/W4/W4-WallWarning level 4 - print errors, warnings and remarks (or enable most warning messages)
/WX/WX-WerrorForce warnings to be reported as errors.
/Gy/Gy​
Separate functions for linker.
/GS-/GS-​
Disable security checks
/O1/O1​
Optimize for Maximum Speed
/Oi/Oi​
Enable Intrinsic functions
/Ob2/Ob2-default-inlineIn-line any function, at the compiler's discretion (same as
/Qip)/GL​
​
Enable link-time code generation
/EHs-/EHs-​
Disable C++ EH (no SHE exceptions)
/EHc-/EHc-​
Disable extern C defaults to no throw
/GF/GF​
Enable read-only string pooling
/Gs8192/Gs8192​
Control stack (8192 bytes) checking calls
/TC/TC​
Compile as .c files
/Yc​
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Create the .pch file
/Gm​
​
Enable minimal rebuilds
/FpAutoGen.h.gch​
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/X/X​
Ignore standard places
/Zi/Zi​
Produce debugging information
Table 29 Static Linker Flags
Microsoft
GCC
Description
/nologo​
Do not display compiler version information
/LTCG​
Use link-time code generation
Table 30 Dynamic Linker Flags
Microsoft
GCC
Description
/NOLOGO​
Do not display compiler version information
/NODEFAULTLIB-nostdlibDisable using default libraries
/IGNORE:4086N/A
Use
/Gz option instead/OPT:ICF=10​
Perform identical COMDAT folding (10 iterations) to remove duplicates.
/MAP-Map filename.mapCreate a map file.
/ALIGN:32--section-alignment 0x20Use 32-byte alignment instead of the default 4K
​
--file-alignment 0x20​
/MACHINE:$N/A
Where $ is one of:
I386, AMD64 or IA64/DLL--dllThe output is a DLL
/LTCG​
Use link-time code generation
/ENTRY:$(ENTRYPOINT)--entry _$(ENTRYPOINT)The function that specifies a starting address.
/SUBSYSTEM:CONSOLE--subsystem consoleDo not use the EFI_* subsystem interface, as this is EFI 1.0 compliant, not UEFI compliant.
/SAFESEH:NO​
Do not produce an image with a table of safe exception handles
/BASE:0--image-base 0x0Base address is always 0, and will be adjusted later by the build tools when creating images.
/DRIVER​
Specify Kernel mode
/DEBUG​
Create debugging information
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-O2Optimize
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--gc-sectionsEnable garbage collection of unused input sections
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--export-all-symbolsAll global symbols in the objects used to build a DLL will be exported by the DLL.
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