| invoke.texi (259890) | invoke.texi (260074) |
|---|---|
| 1@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2@c 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. 3@c This is part of the GCC manual. 4@c For copying conditions, see the file gcc.texi. 5 6@ignore 7@c man begin INCLUDE 8@include gcc-vers.texi --- 153 unchanged lines hidden (view full) --- 162 163@item C Language Options 164@xref{C Dialect Options,,Options Controlling C Dialect}. 165@gccoptlist{-ansi -std=@var{standard} -fgnu89-inline @gol 166-aux-info @var{filename} @gol 167-fno-asm -fno-builtin -fno-builtin-@var{function} @gol 168-fhosted -ffreestanding -fopenmp -fms-extensions @gol 169-trigraphs -no-integrated-cpp -traditional -traditional-cpp @gol | 1@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2@c 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. 3@c This is part of the GCC manual. 4@c For copying conditions, see the file gcc.texi. 5 6@ignore 7@c man begin INCLUDE 8@include gcc-vers.texi --- 153 unchanged lines hidden (view full) --- 162 163@item C Language Options 164@xref{C Dialect Options,,Options Controlling C Dialect}. 165@gccoptlist{-ansi -std=@var{standard} -fgnu89-inline @gol 166-aux-info @var{filename} @gol 167-fno-asm -fno-builtin -fno-builtin-@var{function} @gol 168-fhosted -ffreestanding -fopenmp -fms-extensions @gol 169-trigraphs -no-integrated-cpp -traditional -traditional-cpp @gol |
| 170-fallow-single-precision -fcond-mismatch @gol | 170-fallow-single-precision -fcond-mismatch -flax-vector-conversions @gol |
| 171-fsigned-bitfields -fsigned-char @gol 172@c APPLE LOCAL -Wnewline-eof 2001-08-23 --sts ** 173-Wnewline-eof (Apple compatible) @gol 174-funsigned-bitfields -funsigned-char} 175 176@item C++ Language Options 177@xref{C++ Dialect Options,,Options Controlling C++ Dialect}. 178@gccoptlist{-fabi-version=@var{n} -fno-access-control -fcheck-new @gol --- 4 unchanged lines hidden (view full) --- 183-fno-implicit-templates @gol 184-fno-implicit-inline-templates @gol 185-fno-implement-inlines -fms-extensions @gol 186-fno-nonansi-builtins -fno-operator-names @gol 187-fno-optional-diags -fpermissive @gol 188-frepo -fno-rtti -fstats -ftemplate-depth-@var{n} @gol 189-fno-threadsafe-statics -fuse-cxa-atexit -fno-weak -nostdinc++ @gol 190-fno-default-inline -fvisibility-inlines-hidden @gol | 171-fsigned-bitfields -fsigned-char @gol 172@c APPLE LOCAL -Wnewline-eof 2001-08-23 --sts ** 173-Wnewline-eof (Apple compatible) @gol 174-funsigned-bitfields -funsigned-char} 175 176@item C++ Language Options 177@xref{C++ Dialect Options,,Options Controlling C++ Dialect}. 178@gccoptlist{-fabi-version=@var{n} -fno-access-control -fcheck-new @gol --- 4 unchanged lines hidden (view full) --- 183-fno-implicit-templates @gol 184-fno-implicit-inline-templates @gol 185-fno-implement-inlines -fms-extensions @gol 186-fno-nonansi-builtins -fno-operator-names @gol 187-fno-optional-diags -fpermissive @gol 188-frepo -fno-rtti -fstats -ftemplate-depth-@var{n} @gol 189-fno-threadsafe-statics -fuse-cxa-atexit -fno-weak -nostdinc++ @gol 190-fno-default-inline -fvisibility-inlines-hidden @gol |
| 191-fvisibility-ms-compat @gol |
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| 191-Wabi -Wctor-dtor-privacy @gol 192-Wnon-virtual-dtor -Wreorder @gol 193-Weffc++ -Wno-deprecated -Wstrict-null-sentinel @gol 194-Wno-non-template-friend -Wold-style-cast @gol 195-Woverloaded-virtual -Wno-pmf-conversions @gol 196-Wsign-promo} 197 198@item Language Independent Options --- 1135 unchanged lines hidden (view full) --- 1334CPP manual for details. 1335 1336@item -fcond-mismatch 1337@opindex fcond-mismatch 1338Allow conditional expressions with mismatched types in the second and 1339third arguments. The value of such an expression is void. This option 1340is not supported for C++. 1341 | 192-Wabi -Wctor-dtor-privacy @gol 193-Wnon-virtual-dtor -Wreorder @gol 194-Weffc++ -Wno-deprecated -Wstrict-null-sentinel @gol 195-Wno-non-template-friend -Wold-style-cast @gol 196-Woverloaded-virtual -Wno-pmf-conversions @gol 197-Wsign-promo} 198 199@item Language Independent Options --- 1135 unchanged lines hidden (view full) --- 1335CPP manual for details. 1336 1337@item -fcond-mismatch 1338@opindex fcond-mismatch 1339Allow conditional expressions with mismatched types in the second and 1340third arguments. The value of such an expression is void. This option 1341is not supported for C++. 1342 |
| 1343@item -flax-vector-conversions 1344@opindex flax-vector-conversions 1345Allow implicit conversions between vectors with differing numbers of 1346elements and/or incompatible element types. This option should not be 1347used for new code. 1348 |
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| 1342@item -funsigned-char 1343@opindex funsigned-char 1344Let the type @code{char} be unsigned, like @code{unsigned char}. 1345 1346Each kind of machine has a default for what @code{char} should 1347be. It is either like @code{unsigned char} by default or like 1348@code{signed char} by default. 1349 --- 267 unchanged lines hidden (view full) --- 1617compare pointers to a particular inline method, you might mark it as 1618having default visibility. Marking the enclosing class with explicit 1619visibility will have no effect. 1620 1621Explicitly instantiated inline methods are unaffected by this option 1622as their linkage might otherwise cross a shared library boundary. 1623@xref{Template Instantiation}. 1624 | 1349@item -funsigned-char 1350@opindex funsigned-char 1351Let the type @code{char} be unsigned, like @code{unsigned char}. 1352 1353Each kind of machine has a default for what @code{char} should 1354be. It is either like @code{unsigned char} by default or like 1355@code{signed char} by default. 1356 --- 267 unchanged lines hidden (view full) --- 1624compare pointers to a particular inline method, you might mark it as 1625having default visibility. Marking the enclosing class with explicit 1626visibility will have no effect. 1627 1628Explicitly instantiated inline methods are unaffected by this option 1629as their linkage might otherwise cross a shared library boundary. 1630@xref{Template Instantiation}. 1631 |
| 1632@item -fvisibility-ms-compat 1633@opindex fvisibility-ms-compat 1634This flag attempts to use visibility settings to make GCC's C++ 1635linkage model compatible with that of Microsoft Visual Studio. 1636 1637The flag makes these changes to GCC's linkage model: 1638 1639@enumerate 1640@item 1641It sets the default visibility to @code{hidden}, like 1642@option{-fvisibility=hidden}. 1643 1644@item 1645Types, but not their members, are not hidden by default. 1646 1647@item 1648The One Definition Rule is relaxed for types without explicit 1649visibility specifications which are defined in more than one different 1650shared object: those declarations are permitted if they would have 1651been permitted when this option was not used. 1652@end enumerate 1653 1654In new code it is better to use @option{-fvisibility=hidden} and 1655export those classes which are intended to be externally visible. 1656Unfortunately it is possible for code to rely, perhaps accidentally, 1657on the Visual Studio behaviour. 1658 1659Among the consequences of these changes are that static data members 1660of the same type with the same name but defined in different shared 1661objects will be different, so changing one will not change the other; 1662and that pointers to function members defined in different shared 1663objects may not compare equal. When this flag is given, it is a 1664violation of the ODR to define types with the same name differently. 1665 |
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| 1625@item -fno-weak 1626@opindex fno-weak 1627Do not use weak symbol support, even if it is provided by the linker. 1628By default, G++ will use weak symbols if they are available. This 1629option exists only for testing, and should not be used by end-users; 1630it will result in inferior code and has no benefits. This option may 1631be removed in a future release of G++. 1632 --- 12375 unchanged lines hidden --- | 1666@item -fno-weak 1667@opindex fno-weak 1668Do not use weak symbol support, even if it is provided by the linker. 1669By default, G++ will use weak symbols if they are available. This 1670option exists only for testing, and should not be used by end-users; 1671it will result in inferior code and has no benefits. This option may 1672be removed in a future release of G++. 1673 --- 12375 unchanged lines hidden --- |