diff options
Diffstat (limited to 'woe32dll')
| -rw-r--r-- | woe32dll/export.h | 106 | ||||
| -rw-r--r-- | woe32dll/unistring-exports.c | 146 |
2 files changed, 252 insertions, 0 deletions
diff --git a/woe32dll/export.h b/woe32dll/export.h new file mode 100644 index 00000000..3e8a21fc --- /dev/null +++ b/woe32dll/export.h @@ -0,0 +1,106 @@ +/* Exporting symbols from Cygwin shared libraries. + Copyright (C) 2006 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2006. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* There are four ways to build shared libraries on Cygwin: + + - Export only functions, no variables. + This has the drawback of severely affecting the programming style in use. + It does not let the programmer use full ANSI C. It lets one platform + dictate the code style on all platforms. This is unacceptable. + + - Use the GNU ld --enable-auto-import option. It is the default on Cygwin + since July 2005. But it has three fatal drawbacks: + - It produces executables and shared libraries with relocations in the + .text segment, defeating the principles of virtual memory. + - For some constructs such as + extern int var; + int * const b = &var; + it creates an executable that will give an error at runtime, rather + than either a compile-time or link-time error or a working executable. + (This is with both gcc and g++.) Whereas this code, not relying on + auto-import: + extern __declspec (dllimport) int var; + int * const b = &var; + gives a compile-time error with gcc and works with g++. + - It doesn't work in some cases (references to a member field of an + exported struct variable, or to a particular element of an exported + array variable), requiring code modifications. Again one platform + dictates code modifications on all platforms. + + This is unacceptable. Therefore we disable this option, through the + woe32-dll.m4 autoconf macro. + + - Define a macro that expands to __declspec(dllexport) when building + the library and to __declspec(dllimport) when building code outside + the library, and use it in all header files of the library. + This is acceptable if + 1. the header files are unique to this library (not shared with + other packages), and + 2. the library sources are contained in one directory, making it easy + to define a -DBUILDING_LIBXYZ flag for the library. + Example: + #ifdef BUILDING_LIBASPRINTF + #define LIBASPRINTF_DLL_EXPORTED __declspec(dllexport) + #else + #define LIBASPRINTF_DLL_EXPORTED __declspec(dllimport) + #endif + + We use this technique for the libintl and the libasprintf libraries. + + - Define a macro that expands to __declspec(dllimport) always, and use + it in all header files of the library. Use an explicit export list for + the library. + This is acceptable if + 1. the programming language is not C++ (because the name mangling of + static struct/class fields and of variables in namespaces makes it + hard to maintain an export list). + The benefit of this approach is that the partitioning of the source files + into libraries (which source file goes into which library) does not + affect the source code; only the Makefiles reflect it. + The performance loss due to the unnecessary indirection for references + to variables from within the library defining the variable is acceptable. + + We use this technique for libgettextlib (because it contains many gnulib + modules) and for libgettextsrc (because this makes it easy to move source + code from an msg* program to libgettextsrc). The macro is called + DLL_VARIABLE. + + This file allows building an explicit export list. You can either + - specify the variables to be exported, and use the GNU ld option + --export-all-symbols to export all function names, or + - specify the variables and functions to be exported explicitly. + + Note: --export-all-symbols is the default when no other symbol is explicitly + exported. This means, the use of an explicit export on the variables has + the effect of no longer exporting the functions! - until the option + --export-all-symbols is used. */ + + /* IMP(x) is a symbol that contains the address of x. */ +#define IMP(x) _imp__##x + + /* Ensure that the variable x is exported from the library, and that a + pseudo-variable IMP(x) is available. */ +#define VARIABLE(x) \ + /* Export x without redefining x. This code was found by compiling a \ + snippet: \ + extern __declspec(dllexport) int x; int x = 42; */ \ + asm (".section .drectve\n"); \ + asm (".ascii \" -export:" #x ",data\"\n"); \ + asm (".data\n"); \ + /* Allocate a pseudo-variable IMP(x). */ \ + extern int x; \ + void * IMP(x) = &x; diff --git a/woe32dll/unistring-exports.c b/woe32dll/unistring-exports.c new file mode 100644 index 00000000..a32ae611 --- /dev/null +++ b/woe32dll/unistring-exports.c @@ -0,0 +1,146 @@ +/* List of exported symbols of libunistring on Cygwin. + Copyright (C) 2006, 2009 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2006. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include "woe32dll/export.h" + +/* Variables declared in unictype.h */ +VARIABLE(UC_CATEGORY_C) +VARIABLE(UC_CATEGORY_Cc) +VARIABLE(UC_CATEGORY_Cf) +VARIABLE(UC_CATEGORY_Cn) +VARIABLE(UC_CATEGORY_Co) +VARIABLE(UC_CATEGORY_Cs) +VARIABLE(UC_CATEGORY_L) +VARIABLE(UC_CATEGORY_Ll) +VARIABLE(UC_CATEGORY_Lm) +VARIABLE(UC_CATEGORY_Lo) +VARIABLE(UC_CATEGORY_Lt) +VARIABLE(UC_CATEGORY_Lu) +VARIABLE(UC_CATEGORY_M) +VARIABLE(UC_CATEGORY_Mc) +VARIABLE(UC_CATEGORY_Me) +VARIABLE(UC_CATEGORY_Mn) +VARIABLE(UC_CATEGORY_N) +VARIABLE(UC_CATEGORY_Nd) +VARIABLE(UC_CATEGORY_Nl) +VARIABLE(UC_CATEGORY_No) +VARIABLE(UC_CATEGORY_P) +VARIABLE(UC_CATEGORY_Pc) +VARIABLE(UC_CATEGORY_Pd) +VARIABLE(UC_CATEGORY_Pe) +VARIABLE(UC_CATEGORY_Pf) +VARIABLE(UC_CATEGORY_Pi) +VARIABLE(UC_CATEGORY_Po) +VARIABLE(UC_CATEGORY_Ps) +VARIABLE(UC_CATEGORY_S) +VARIABLE(UC_CATEGORY_Sc) +VARIABLE(UC_CATEGORY_Sk) +VARIABLE(UC_CATEGORY_Sm) +VARIABLE(UC_CATEGORY_So) +VARIABLE(UC_CATEGORY_Z) +VARIABLE(UC_CATEGORY_Zl) +VARIABLE(UC_CATEGORY_Zp) +VARIABLE(UC_CATEGORY_Zs) +VARIABLE(UC_PROPERTY_ALPHABETIC) +VARIABLE(UC_PROPERTY_ASCII_HEX_DIGIT) +VARIABLE(UC_PROPERTY_BIDI_ARABIC_DIGIT) +VARIABLE(UC_PROPERTY_BIDI_ARABIC_RIGHT_TO_LEFT) +VARIABLE(UC_PROPERTY_BIDI_BLOCK_SEPARATOR) +VARIABLE(UC_PROPERTY_BIDI_BOUNDARY_NEUTRAL) +VARIABLE(UC_PROPERTY_BIDI_COMMON_SEPARATOR) +VARIABLE(UC_PROPERTY_BIDI_CONTROL) +VARIABLE(UC_PROPERTY_BIDI_EMBEDDING_OR_OVERRIDE) +VARIABLE(UC_PROPERTY_BIDI_EUROPEAN_DIGIT) +VARIABLE(UC_PROPERTY_BIDI_EUR_NUM_SEPARATOR) +VARIABLE(UC_PROPERTY_BIDI_EUR_NUM_TERMINATOR) +VARIABLE(UC_PROPERTY_BIDI_HEBREW_RIGHT_TO_LEFT) +VARIABLE(UC_PROPERTY_BIDI_LEFT_TO_RIGHT) +VARIABLE(UC_PROPERTY_BIDI_NON_SPACING_MARK) +VARIABLE(UC_PROPERTY_BIDI_OTHER_NEUTRAL) +VARIABLE(UC_PROPERTY_BIDI_PDF) +VARIABLE(UC_PROPERTY_BIDI_SEGMENT_SEPARATOR) +VARIABLE(UC_PROPERTY_BIDI_WHITESPACE) +VARIABLE(UC_PROPERTY_COMBINING) +VARIABLE(UC_PROPERTY_COMPOSITE) +VARIABLE(UC_PROPERTY_CURRENCY_SYMBOL) +VARIABLE(UC_PROPERTY_DASH) +VARIABLE(UC_PROPERTY_DECIMAL_DIGIT) +VARIABLE(UC_PROPERTY_DEFAULT_IGNORABLE_CODE_POINT) +VARIABLE(UC_PROPERTY_DEPRECATED) +VARIABLE(UC_PROPERTY_DIACRITIC) +VARIABLE(UC_PROPERTY_EXTENDER) +VARIABLE(UC_PROPERTY_FORMAT_CONTROL) +VARIABLE(UC_PROPERTY_GRAPHEME_BASE) +VARIABLE(UC_PROPERTY_GRAPHEME_EXTEND) +VARIABLE(UC_PROPERTY_GRAPHEME_LINK) +VARIABLE(UC_PROPERTY_HEX_DIGIT) +VARIABLE(UC_PROPERTY_HYPHEN) +VARIABLE(UC_PROPERTY_IDEOGRAPHIC) +VARIABLE(UC_PROPERTY_IDS_BINARY_OPERATOR) +VARIABLE(UC_PROPERTY_IDS_TRINARY_OPERATOR) +VARIABLE(UC_PROPERTY_ID_CONTINUE) +VARIABLE(UC_PROPERTY_ID_START) +VARIABLE(UC_PROPERTY_IGNORABLE_CONTROL) +VARIABLE(UC_PROPERTY_ISO_CONTROL) +VARIABLE(UC_PROPERTY_JOIN_CONTROL) +VARIABLE(UC_PROPERTY_LEFT_OF_PAIR) +VARIABLE(UC_PROPERTY_LINE_SEPARATOR) +VARIABLE(UC_PROPERTY_LOGICAL_ORDER_EXCEPTION) +VARIABLE(UC_PROPERTY_LOWERCASE) +VARIABLE(UC_PROPERTY_MATH) +VARIABLE(UC_PROPERTY_NON_BREAK) +VARIABLE(UC_PROPERTY_NOT_A_CHARACTER) +VARIABLE(UC_PROPERTY_NUMERIC) +VARIABLE(UC_PROPERTY_OTHER_ALPHABETIC) +VARIABLE(UC_PROPERTY_OTHER_DEFAULT_IGNORABLE_CODE_POINT) +VARIABLE(UC_PROPERTY_OTHER_GRAPHEME_EXTEND) +VARIABLE(UC_PROPERTY_OTHER_ID_CONTINUE) +VARIABLE(UC_PROPERTY_OTHER_ID_START) +VARIABLE(UC_PROPERTY_OTHER_LOWERCASE) +VARIABLE(UC_PROPERTY_OTHER_MATH) +VARIABLE(UC_PROPERTY_OTHER_UPPERCASE) +VARIABLE(UC_PROPERTY_PAIRED_PUNCTUATION) +VARIABLE(UC_PROPERTY_PARAGRAPH_SEPARATOR) +VARIABLE(UC_PROPERTY_PATTERN_SYNTAX) +VARIABLE(UC_PROPERTY_PATTERN_WHITE_SPACE) +VARIABLE(UC_PROPERTY_PRIVATE_USE) +VARIABLE(UC_PROPERTY_PUNCTUATION) +VARIABLE(UC_PROPERTY_QUOTATION_MARK) +VARIABLE(UC_PROPERTY_RADICAL) +VARIABLE(UC_PROPERTY_SENTENCE_TERMINAL) +VARIABLE(UC_PROPERTY_SOFT_DOTTED) +VARIABLE(UC_PROPERTY_SPACE) +VARIABLE(UC_PROPERTY_TERMINAL_PUNCTUATION) +VARIABLE(UC_PROPERTY_TITLECASE) +VARIABLE(UC_PROPERTY_UNASSIGNED_CODE_VALUE) +VARIABLE(UC_PROPERTY_UNIFIED_IDEOGRAPH) +VARIABLE(UC_PROPERTY_UPPERCASE) +VARIABLE(UC_PROPERTY_VARIATION_SELECTOR) +VARIABLE(UC_PROPERTY_WHITE_SPACE) +VARIABLE(UC_PROPERTY_XID_CONTINUE) +VARIABLE(UC_PROPERTY_XID_START) +VARIABLE(UC_PROPERTY_ZERO_WIDTH) +/* Variables declared in uninorm.h */ +VARIABLE(uninorm_nfc) +VARIABLE(uninorm_nfd) +VARIABLE(uninorm_nfkc) +VARIABLE(uninorm_nfkd) +/* Variables declared in unicase.h */ +VARIABLE(unicase_empty_prefix_context) +VARIABLE(unicase_empty_suffix_context) +/* Variables declared in unistring/version.h */ +VARIABLE(_libunistring_version) |