[MacPorts] #61509: jbig2dec fails to build on macOS 11.0 (Big Sur)

[MacPorts]

#61509: jbig2dec fails to build on macOS 11.0 (Big Sur)
--------------------+----------------------
 Reporter:  moyang  |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.6.4
 Keywords:          |       Port:  jbig2dec
--------------------+----------------------
 It fails on configuration stage. Full log is attached.

 ```
 configure:3441: checking whether the C compiler works
 configure:3463: /usr/bin/clang -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -arch x86_64
 -I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
 -L/opt/local/lib -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -arch
 x86_64 conftest.c  >&5
 clang: error: invalid version number in 'MACOSX_DEPLOYMENT_TARGET=11.0'
 configure:3467: $? = 1
 configure:3505: result: no
 configure: failed program was:
 | /* confdefs.h */
 | #define PACKAGE_NAME "jbig2dec"
 | #define PACKAGE_TARNAME "jbig2dec"
 | #define PACKAGE_VERSION "0.19"
 | #define PACKAGE_STRING "jbig2dec 0.19"
 | #define PACKAGE_BUGREPORT "gs-devel at ghostscript.com"
 | #define PACKAGE_URL ""
 | #define PACKAGE "jbig2dec"
 | #define VERSION "0.19"
 | /* end confdefs.h.  */
 |
 | int
 | main ()
 | {
 |
 |   ;
 |   return 0;
 | }
 configure:3510: error: in
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_jbig2dec/jbig2dec/work/jbig2dec-0.19':
 configure:3512: error: C compiler cannot create executables
 See `config.log' for more details

 ```

-- 
Ticket URL: <https://trac.macports.org/ticket/61509>
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