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Hide private symbols (issue #33). #34

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merged 1 commit into from
May 22, 2018
Merged

Hide private symbols (issue #33). #34

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2 changes: 2 additions & 0 deletions caca/caca.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@
# define __extern extern __declspec(dllexport)
#elif defined _WIN32 && !defined __LIBCACA__ && !defined CACA_STATIC
# define __extern extern __declspec(dllimport)
#elif defined CACA_ENABLE_VISIBILITY
# define __extern extern __attribute__((visibility("default")))
#else
# define __extern extern
#endif
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2 changes: 2 additions & 0 deletions caca/caca0.h
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Expand Up @@ -26,6 +26,8 @@
# define __extern extern __declspec(dllexport)
#elif defined _WIN32 && !defined __LIBCACA__
# define __extern extern __declspec(dllimport)
#elif defined CACA_ENABLE_VISIBILITY
# define __extern extern __attribute__((visibility("default")))
#else
# define __extern extern
#endif
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10 changes: 10 additions & 0 deletions configure.ac
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Expand Up @@ -387,6 +387,16 @@ CFLAGS="${CFLAGS} -g -O2 -fno-strength-reduce -fomit-frame-pointer"
CFLAGS="${CFLAGS} -Wall -Wpointer-arith -Wcast-align -Wcast-qual -Wstrict-prototypes -Wshadow -Waggregate-return -Wmissing-prototypes -Wnested-externs -Wsign-compare"
CXXFLAGS="${CXXFLAGS} -Wall -Wpointer-arith -Wcast-align -Wcast-qual -Wshadow -Wsign-compare"

dnl Visibility annotations...
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fvisibility=hidden -Wall -Werror"
AC_MSG_CHECKING(whether compiler supports visibility annotations)
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[void __attribute__((visibility("default"))) foo(void); void foo(void) {}]])],
[CFLAGS="$saved_CFLAGS -fvisibility=hidden -DCACA_ENABLE_VISIBILITY";
AC_MSG_RESULT(yes)],
[CFLAGS="$saved_CFLAGS"
AC_MSG_RESULT(no)])

CACA_BINDINGS=""

# Build the C++ bindings?
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2 changes: 2 additions & 0 deletions cxx/caca++.h
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Expand Up @@ -26,6 +26,8 @@
#undef __class
#if defined(_WIN32) && defined(__LIBCACA_PP__)
# define __class class __declspec(dllexport)
#elif defined CACA_ENABLE_VISIBILITY
# define __class class __attribute__((visibility("default")))
#else
# define __class class
#endif
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