AC_COMPILE_IFELSE only tries to compile a *.c to a *.o. The Solaris Studio 12.1 through 12.5 compilers see the -fvisibility=hidden flag, but ignore it with a warning of: cc: Warning: Option -fvisibility=hidden passed to ld, if ld is invoked, ignored otherwise
AC_LINK_IFELSE does the compile and then tries to link the result, at which point the Solaris linker will issue an error: ld: fatal: option '-fvisibility=hidden' is incompatible with building a dynamic executable If we don't use AC_LINK_IFELSE to catch the error, then configure will fail further tests which attempt to link, such as those testing dependencies like libbz2. Also, don't try adding -fvisibility if we've already added -xldscope, just use one of them, since Sun Studio 12 and earlier compilers only issue a warning, and don't try passing through to the linker to generate an error, so AC_LINK_IFELSE doesn't catch them. Tested on Solaris 11.4 beta with compiler versions: Sun Studio 8 (Sun C 5.5) Sun Studio 10 (Sun C 5.7) Sun Studio 11 (Sun C 5.8) Sun Studio 12 (Sun C 5.9) Sun Studio 12.1 (Sun C 5.10) Oracle Solaris Studio 12.2 (Sun C 5.11) Oracle Solaris Studio 12.3 (Sun C 5.12) Oracle Solaris Studio 12.4 (Sun C 5.13) Oracle Developer Studio 12.5 (Sun C 5.14) Oracle Developer Studio 12.6 (Sun C 5.15) gcc 5.5.0 gcc 7.3.0 and verified the libfreetype.so.6 generated by each of those compilers exported the same set of symbols. Signed-off-by: Alan Coopersmith <alan.coopersm...@oracle.com> --- builds/unix/configure.raw | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/builds/unix/configure.raw b/builds/unix/configure.raw index 8eded34b4..79c93a7ca 100644 --- a/builds/unix/configure.raw +++ b/builds/unix/configure.raw @@ -311,22 +311,26 @@ AC_SUBST([XX_ANSIFLAGS]) # It is recommended that shared libraries hide symbols except those with # explicit __attribute__((visibility("default"))). # +found_visibility_flag=no AC_MSG_CHECKING([for -xldscope=hidden compiler flag]) orig_CFLAGS="${CFLAGS}" CFLAGS="${CFLAGS} -xldscope=hidden" -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], +AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])], + found_visibility_flag=yes + AC_MSG_RESULT(yes), + CFLAGS="${orig_CFLAGS}" + AC_MSG_RESULT(no)) + +if test "${found_visibility_flag}" = "no" ; then + AC_MSG_CHECKING([for -fvisibility=hidden compiler flag]) + orig_CFLAGS="${CFLAGS}" + CFLAGS="${CFLAGS} -fvisibility=hidden" + AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])], + found_visibility_flag=yes AC_MSG_RESULT(yes), CFLAGS="${orig_CFLAGS}" AC_MSG_RESULT(no)) - -AC_MSG_CHECKING([for -fvisibility=hidden compiler flag]) -orig_CFLAGS="${CFLAGS}" -CFLAGS="${CFLAGS} -fvisibility=hidden" -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])], - AC_MSG_RESULT(yes), - CFLAGS="${orig_CFLAGS}" - AC_MSG_RESULT(no)) - +fi # All library tests below try `pkg-config' first. If that fails, a function # from the library is tested in the traditional autoconf way (zlib, bzip2), -- 2.15.0 _______________________________________________ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel