Appendix K Third Party Tool Flags

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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
-c
Compile C files to object (.obj) files only, do not link
/WX
/WX
-Werror
Force warnings to be reported as errors.
/GS-
/GS-
​
Disable security checks
​
​
-Wno-missing-braces
Warn 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.
​
​
-Wno-array-bounds
Disables warnings if subscripts to arrays are out of bounds.
/W4
/W4
-Wall
Warning level 4 - print errors, warnings and remarks (or enable most warning messages)
/Gs32768
​
​
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.
​
/Oi
​
Enable Intrinsic functions
​
/Ob2
-default-inline
In-line any function, at the compiler's discretion (same as /Qip)
​
​
-O
Optimize output file
/GL
​
​
Enable link-time code generation
/EHs-c-
​
​
Combine /EHs- and /EHc-
​
/EHs-
​
Disable C++ EH (no SHE exceptions)
​
/EHc-
​
Disable extern C defaults to no throw
/GF
GF
​
Enable read-only string pooling
/GR-
​
​
Disable C++ RTTI
Table 25 Assembly Flags
Microsoft
GCC
Description
/nologo
​
Do not display assembler version information
/c
-c
Generate 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)
​
-x assembler
Input files are in assembly language
​
-imacros AutoGen.h
Accept 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
-E
Preprocess only; do not compile, assemble or link
/TC
/TC
-x assembler-with-cpp
Compile as .c files
/FIAutoGen.h
/FIAutoGen.h
--include AutoGen.h
Always 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
-E
Preprocess only; do not compile, assemble or link
/TC
/TC
-x c
Compile as .c files
/D VFRCOMPILE
/D VFRCOMPILE
-DVFRCOMPILE
Used only for Preprocessing VFR files
​
​
-P
Used only for Preprocessing VFR files - do not generate #line directives
/FI$(MOD_NAME)StrDefs.h
​
​
Force include of the module's StrDefs.h file.
Table 28 Pre-compiled Header (PCH) Creation Flags
Microsoft
Intel
GCC
Description
/nologo
/nologo
​
Do not display compiler version information
/c
/c
-c
Compile C files to object (.obj) files only, do not link
/W4
/W4
-Wall
Warning level 4 - print errors, warnings and remarks (or enable most warning messages)
/WX
/WX
-Werror
Force warnings to be reported as errors.
/Gy
/Gy
​
Separate functions for linker.
/GS-
/GS-
​
Disable security checks
/O1
/O1
​
Optimize for Maximum Speed
/Oi
/Oi
​
Enable Intrinsic functions
/Ob2
/Ob2
-default-inline
In-line any function, at the compiler's discretion (same as /Qip)
/GL
​
​
Enable link-time code generation
/EHs-
/EHs-
​
Disable C++ EH (no SHE exceptions)
/EHc-
/EHc-
​
Disable extern C defaults to no throw
/GF
/GF
​
Enable read-only string pooling
/Gs8192
/Gs8192
​
Control stack (8192 bytes) checking calls
/TC
/TC
​
Compile as .c files
/Yc
​
​
Create the .pch file
/Gm
​
​
Enable minimal rebuilds
/FpAutoGen.h.gch
​
​
​
/X
/X
​
Ignore standard places
Table 29 Static Linker Flags
Microsoft
GCC
Description
/nologo
​
Do not display compiler version information
/LTCG
​
Use link-time code generation
Table 30 Dynamic Linker Flags
Microsoft
GCC
Description
/NOLOGO
​
Do not display compiler version information
/NODEFAULTLIB
-nostdlib
Disable using default libraries
/IGNORE:4086
N/A
Use /Gz option instead
/OPT:ICF=10
​
Perform identical COMDAT folding (10 iterations) to remove duplicates.
/MAP
-Map filename.map
Create a map file.
/ALIGN:32
--section-alignment 0x20
Use 32-byte alignment instead of the default 4K
​
--file-alignment 0x20
​
/MACHINE:$
N/A
Where $ is one of: I386, AMD64 or IA64
/DLL
--dll
The output is a DLL
/LTCG
​
Use link-time code generation
/ENTRY:$(ENTRYPOINT)
--entry _$(ENTRYPOINT)
The function that specifies a starting address.
/SUBSYSTEM:CONSOLE
--subsystem console
Do 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 0x0
Base address is always 0, and will be adjusted later by the build tools when creating images.
/DRIVER
​
Specify Kernel mode
/DEBUG
​
Create debugging information
​
-O2
Optimize
​
--gc-sections
Enable garbage collection of unused input sections
​
--export-all-symbols
All global symbols in the objects used to build a DLL will be exported by the DLL.
J.1 NMAKE Module Makefile Format
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Table 24 Standard C File Compiler Options
Table 25 Assembly Flags
Table 26 C Compiler's Preprocessor Options
Table 27 C Compiler's Preprocessor Options for VFR files ONLY
Table 28 Pre-compiled Header (PCH) Creation Flags
Table 29 Static Linker Flags
Table 30 Dynamic Linker Flags