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freetype2
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Code Issues 4 Releases Wiki Activity

Further fix to visibility flag testing with Solaris Studio compilers. 

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 have 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.

* builds/unix/configure.raw: Implement it.
This commit is contained in:
Alan Coopersmith 2018-05-10 10:10:43 +02:00 committed by Werner Lemberg
parent e0015f7612
commit 9e345c9117
2 changed files with 62 additions and 12 deletions
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46
ChangeLog
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@ -1,3 +1,49 @@
2018-05-10 Alan Coopersmith <alan.coopersmith@oracle.com>
Fix DLL compilation on Solaris.
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 have 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.
* builds/unix/configure.raw: Implement it.
2018-05-08 Werner Lemberg <wl@gnu.org>
[autofit] Avoid potential SEGV if running out of memory.

28
builds/unix/configure.raw
View File

@ -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_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))
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)])
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),