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author | Guy Harris <guy@alum.mit.edu> | 2016-09-06 20:51:23 -0700 |
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committer | Guy Harris <guy@alum.mit.edu> | 2016-09-07 03:53:40 +0000 |
commit | 0495fc3bdd89d40fdb10108fea80f0cb8d9825de (patch) | |
tree | fb0819bbb341e6634b9205f9e5c5bcdd57b5d47b /CMakeLists.txt | |
parent | 5c388384329775538d618681f571d5f052bc2ae6 (diff) | |
download | wireshark-0495fc3bdd89d40fdb10108fea80f0cb8d9825de.tar.gz |
Add some notes about XLC, HP C, and Sun/Oracle C.
Change-Id: I2f65face2aa7354ec350aed308402bb719bd619f
Reviewed-on: https://code.wireshark.org/review/17546
Reviewed-by: Guy Harris <guy@alum.mit.edu>
Diffstat (limited to 'CMakeLists.txt')
-rw-r--r-- | CMakeLists.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 5b09c508a1..b192dc4835 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -349,10 +349,36 @@ else() # Many modern compilers use c99 by default, but for older ones # (like GCC 4.4.7), -std=gnu99 is required to avoid errors about # use constructs like "for (int i = 0; i < n; i++) ;" + # + # Older versions of IBM XL C may require -qlanglvl=extc99. + # With V7.0, the "xlc" command defaults to C89; with 10.1, + # it defaults to C99 (both with IBM syntax extensions). + # + # HP's manual for HP C/HP-UX B.11.11.04 (the tenth + # edition of the manual), for PA-RISC, "documents + # new HP C features that support C99 industry standards". + # The manual for Version A.06.25 for Itanium mentions an + # -AC99 flag to support C99, but says it's the default; + # some older versions might require -AC99. + # + # As of Sun Studio 8, the compiler appears to default + # to supporting some C99 language features, but not + # C99 library differences from C89; -xc99 will give + # you both. The earlier Sun Forte Developer 6 update 2 + # might or might not support thosee C99 language features + # by default, and doesn't speak of library differences; + # if it doesn't support the language features by default, + # -xc99 will support them. + # if(CMAKE_C_COMPILER_ID MATCHES "GNU") set(CMAKE_C_FLAGS "-std=gnu99 ${CMAKE_C_FLAGS}") endif() else() + # + # Current versions of CMake do not support options to + # request C99 for XL C, HP C, or Oracle C. (They may + # not be necessary for current versions.) + # set(CMAKE_C_STANDARD 99) endif() |