Re: Compilation issue on Mac OS

[ajay saxena <aileronajay () gmail com>]

Also clang documentation (https://clang.llvm.org/docs/UsersManual.html)
states

Building a relocatable precompiled header requires two additional
arguments. First, pass the --relocatable-pch flag to indicate that the
resulting PCH file should be relocatable. Second, pass -isysroot
/path/to/build, which makes all includes for your library relative to the
build directory. For example:

# clang -x c-header --relocatable-pch -isysroot /path/to/build
/path/to/build/mylib.h mylib.h.pch

When loading the relocatable PCH file, the various headers used in the PCH
file are found from the system header root. For example, mylib.h can be
found in /usr/include/mylib.h. If the headers are installed in some other
system root, the -isysroot option can be used provide a different system
root from which the headers will be based. For example, -isysroot
/Developer/SDKs/MacOSX10.4u.sdk will look for mylib.h in
/Developer/SDKs/MacOSX10.4u.sdk/usr/include/mylib.h.

On Sat, Apr 22, 2017 at 8:14 PM, ajay saxena <aileronajay () gmail com> wrote:

> Hi Guy,
>
> So i was able to find what is causing the issue. It is the -isysroot
> option.
>
> The -sysroot option is also present when make tries to compile the c file
> in wireshark. When i add this flag to compilation of my test file, my test
> file fails to compile and clang stops searching in /usr/local/include
>
> Ajays-MacBook-Pro:scripts ajasaxen$ cc -v -isysroot
> /Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk importtest.c
>
> Apple LLVM version 8.1.0 (clang-802.0.42)
>
> Target: x86_64-apple-darwin16.5.0
>
> Thread model: posix
>
> InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/
> XcodeDefault.xctoolchain/usr/bin
>
>  "/Applications/Xcode.app/Contents/Developer/Toolchains/
> XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple
> x86_64-apple-macosx10.12.0 -Wdeprecated-objc-isa-usage
> -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free
> -disable-llvm-verifier -discard-value-names -main-file-name importtest.c
> -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim
> -masm-verbose -munwind-tables -target-cpu penryn -target-linker-version
> 278.4 -v -dwarf-column-info -debugger-tuning=lldb -resource-dir
> /Applications/Xcode.app/Contents/Developer/Toolchains/
> XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.1.0 -isysroot
> /Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -fdebug-compilation-dir
> /Users/ajasaxen/scripts -ferror-limit 19 -fmessage-length 163
> -stack-protector 1 -fblocks -fobjc-runtime=macosx-10.12.0
> -fencode-extended-block-signature -fmax-type-align=16
> -fdiagnostics-show-option -fcolor-diagnostics -o /var/folders/c4/
> 55pxmrx11s720rx49cxb3brc0000gn/T/importtest-ce55a6.o -x c importtest.c
>
> clang -cc1 version 8.1.0 (clang-802.0.42) default target
> x86_64-apple-darwin16.5.0
>
> ignoring nonexistent directory "/Applications/Xcode.app/
> Contents/Developer/Platforms/MacOSX.platform/Developer/
> SDKs/MacOSX10.12.sdk/usr/local/include"
>
> ignoring nonexistent directory "/Applications/Xcode.app/
> Contents/Developer/Platforms/MacOSX.platform/Developer/
> SDKs/MacOSX10.12.sdk/Library/Frameworks"
>
> #include "..." search starts here:
>
> #include <...> search starts here:
>
>  /Applications/Xcode.app/Contents/Developer/Toolchains/
> XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.1.0/include
>
>  /Applications/Xcode.app/Contents/Developer/Toolchains/
> XcodeDefault.xctoolchain/usr/include
>
>  /Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include
>
>  /Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks
> (framework directory)
>
> End of search list.
>
> *importtest.c:1:10: **fatal error: **'gcrypt.h' file not found*
>
> #include <gcrypt.h>
>
> *         ^*
>
> 1 error generated.
>
>
> If i remove this option, the compilation succeeds for my test file. I
> think if we are able to avoid this option, the make for wireshark will work
> too.
>
> Thanks,
> Ajay
>
> On Sat, Apr 22, 2017 at 4:47 PM, ajay saxena <aileronajay () gmail com>
> wrote:
>
> > In the Makefile of epan/dissectors, I modified the AM_CPPFLAGS to add -v
> > flag and removed the /usr/local/include that I had earlier added as hack to
> > get the pack-ip.c to compile. Below is the verbose output from the compile
> >
> > make[6]: Nothing to be done for `all'.
> >
> >   CC       packet-ip.lo
> >
> > Apple LLVM version 8.1.0 (clang-802.0.42)
> >
> > Target: x86_64-apple-darwin16.5.0
> >
> > Thread model: posix
> >
> > InstalledDir: /Applications/Xcode.app/Conten
> > ts/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
> >
> >  "/Applications/Xcode.app/Contents/Developer/Toolchains/Xcod
> > eDefault.xctoolchain/usr/bin/clang" -cc1 -triple
> > x86_64-apple-macosx10.12.0 -Wdeprecated-objc-isa-usage
> > -Werror=deprecated-objc-isa-usage -emit-obj -disable-free
> > -disable-llvm-verifier -discard-value-names -main-file-name packet-ip.c
> > -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim
> > -masm-verbose -munwind-tables -target-cpu penryn -target-linker-version
> > 278.4 -v -dwarf-column-info -debug-info-kind=standalone -dwarf-version=4
> > -debugger-tuning=lldb -coverage-file /Users/ajasaxen/gitHubProjects
> > /wireshark-official/wireshark/epan/dissectors/.libs/packet-ip.o
> > -resource-dir /Applications/Xcode.app/Conten
> > ts/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.1.0
> > -dependency-file .deps/packet-ip.Tpo -sys-header-deps -MP -MT packet-ip.lo
> > -isystem /usr/local/Cellar/glib/2.50.3/include/glib-2.0 -isystem
> > /usr/local/Cellar/glib/2.50.3/lib/glib-2.0/include -isystem
> > /usr/local/opt/gettext/include -isystem /usr/local/Cellar/pcre/8.39/include
> > -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.
> > platform/Developer/SDKs/MacOSX10.12.sdk -D HAVE_CONFIG_H -I . -I ../..
> > -I ../.. -I ../../epan -D _FORTIFY_SOURCE=2 -D G_DISABLE_SINGLE_INCLUDES -D
> > G_DISABLE_DEPRECATED -D _REENTRANT -I /usr/local/Cellar/gnutls/3.5.8/include
> > -I /usr/local/Cellar/nettle/3.3/include -I /usr/local/Cellar/libtasn1/4.10/include
> > -I /usr/local/Cellar/p11-kit/0.23.3/include/p11-kit-1 -I
> > /usr/local/opt/libgcrypt/include -I /usr/local/opt/libgpg-error/include
> > -I /usr/include/libxml2 -D PIC -O2 -Werror -Wall -Wextra -Wendif-labels
> > -Wpointer-arith -Wformat-security -Wvla -Waddress -Wattributes
> > -Wdiv-by-zero -Wignored-qualifiers -Wpragmas -Wno-overlength-strings
> > -Wno-long-long -Wheader-guard -Wc++-compat -Wunused-const-variable -Wshadow
> > -Wno-pointer-sign -Wold-style-definition -Wstrict-prototypes
> > -Wshorten-64-to-32 -Werror=implicit -fdebug-compilation-dir
> > /Users/ajasaxen/gitHubProjects/wireshark-official/wireshark/epan/dissectors
> > -ferror-limit 19 -fmessage-length 163 -fvisibility hidden -fwrapv
> > -stack-protector 1 -fblocks -fobjc-runtime=macosx-10.12.0
> > -fencode-extended-block-signature -fmax-type-align=16 -fno-common
> > -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops
> > -vectorize-slp -o .libs/packet-ip.o -x c packet-ip.c
> >
> > clang -cc1 version 8.1.0 (clang-802.0.42) default target
> > x86_64-apple-darwin16.5.0
> >
> > ignoring nonexistent directory "/Applications/Xcode.app/Conte
> > nts/Developer/Platforms/MacOSX.platform/Developer/SDKs/
> > MacOSX10.12.sdk/usr/local/include"
> >
> > ignoring nonexistent directory "/Applications/Xcode.app/Conte
> > nts/Developer/Platforms/MacOSX.platform/Developer/SDKs/
> > MacOSX10.12.sdk/Library/Frameworks"
> >
> > ignoring duplicate directory "../.."
> >
> > #include "..." search starts here:
> >
> > #include <...> search starts here:
> >
> >  .
> >
> >  ../..
> >
> >  ../../epan
> >
> >  /usr/local/Cellar/gnutls/3.5.8/include
> >
> >  /usr/local/Cellar/nettle/3.3/include
> >
> >  /usr/local/Cellar/libtasn1/4.10/include
> >
> >  /usr/local/Cellar/p11-kit/0.23.3/include/p11-kit-1
> >
> >  /usr/local/opt/libgcrypt/include
> >
> >  /usr/local/opt/libgpg-error/include
> >
> >  /usr/include/libxml2
> >
> >  /usr/local/Cellar/glib/2.50.3/include/glib-2.0
> >
> >  /usr/local/Cellar/glib/2.50.3/lib/glib-2.0/include
> >
> >  /usr/local/opt/gettext/include
> >
> >  /usr/local/Cellar/pcre/8.39/include
> >
> >  /Applications/Xcode.app/Contents/Developer/Toolchains/Xcode
> > Default.xctoolchain/usr/bin/../lib/clang/8.1.0/include
> >
> >  /Applications/Xcode.app/Contents/Developer/Toolchains/Xcode
> > Default.xctoolchain/usr/include
> >
> >  /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX
> > .platform/Developer/SDKs/MacOSX10.12.sdk/usr/include
> >
> >  /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX
> > .platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks
> > (framework directory)
> >
> > End of search list.
> >
> > *packet-ip.c:63:10: **fatal error: **'GeoIP.h' file not found*
> >
> > #include <GeoIP.h>
> >
> > *         ^*
> >
> > 1 error generated.
> >
> > make[6]: *** [packet-ip.lo] Error 1
> >
> > make[5]: *** [all-recursive] Error 1
> >
> > make[4]: *** [all] Error 2
> >
> > make[3]: *** [all-recursive] Error 1
> >
> > make[2]: *** [all] Error 2
> >
> > make[1]: *** [all-recursive] Error 1
> >
> > make: *** [all] Error 2
> >
> >
> > On Sat, Apr 22, 2017 at 3:51 PM, Guy Harris <guy () alum mit edu> wrote:
> >
> > > On Apr 21, 2017, at 8:50 PM, ajay saxena <aileronajay () gmail com> wrote:
> > >
> > > > Here is the verbose output from that compile
> > > >
> > > > Ajays-MacBook-Pro:scripts ajasaxen$ gcc -v importtest.c -o importtest
> > > > Apple LLVM version 8.1.0 (clang-802.0.42)
> > > > Target: x86_64-apple-darwin16.5.0
> > > > Thread model: posix
> > > > InstalledDir: /Applications/Xcode.app/Conten
> > > ts/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
> > > >  "/Applications/Xcode.app/Contents/Developer/Toolchains/Xcode
> > > Default.xctoolchain/usr/bin/clang" -cc1 -triple
> > > x86_64-apple-macosx10.12.0 -Wdeprecated-objc-isa-usage
> > > -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free
> > > -disable-llvm-verifier -discard-value-names -main-file-name importtest.c
> > > -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim
> > > -masm-verbose -munwind-tables -target-cpu penryn -target-linker-version
> > > 278.4 -v -dwarf-column-info -debugger-tuning=lldb -resource-dir
> > > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeD
> > > efault.xctoolchain/usr/bin/../lib/clang/8.1.0 -fdebug-compilation-dir
> > > /Users/ajasaxen/scripts -ferror-limit 19 -fmessage-length 169
> > > -stack-protector 1 -fblocks -fobjc-runtime=macosx-10.12.0
> > > -fencode-extended-block-signature -fmax-type-align=16
> > > -fdiagnostics-show-option -fcolor-diagnostics -o
> > > /var/folders/c4/55pxmrx11s720rx49cxb3brc0000gn/T/importtest-8e4727.o -x
> > > c importtest.c
> > > > clang -cc1 version 8.1.0 (clang-802.0.42) default target
> > > x86_64-apple-darwin16.5.0
> > > > #include "..." search starts here:
> > > > #include <...> search starts here:
> > > >  /usr/local/include
> > > >  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeD
> > > efault.xctoolchain/usr/bin/../lib/clang/8.1.0/include
> > > >  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeD
> > > efault.xctoolchain/usr/include
> > > >  /usr/include
> > > >  /System/Library/Frameworks (framework directory)
> > > >  /Library/Frameworks (framework directory)
> > > > End of search list.
> > > >  "/Applications/Xcode.app/Contents/Developer/Toolchains/Xcode
> > > Default.xctoolchain/usr/bin/ld" -demangle -lto_library
> > > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeD
> > > efault.xctoolchain/usr/lib/libLTO.dylib -no_deduplicate -dynamic -arch
> > > x86_64 -macosx_version_min 10.12.0 -o importtest
> > > /var/folders/c4/55pxmrx11s720rx49cxb3brc0000gn/T/importtest-8e4727.o
> > > -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeD
> > > efault.xctoolchain/usr/bin/../lib/clang/8.1.0/lib/darwin/lib
> > > clang_rt.osx.a
> > > > and in this compile /usr/local/include was searched. Whereas when it
> > > compiles wireshark, it does not search in /usr/local/include.
> > >
> > > Try modifying epan/dissectors/Makefile to pass the -v flag to gcc, and
> > > then touch epan/dissectors/packet-ip.c and run a make, so we can see the
> > > gcc -v output when trying to compile it.
> > > ____________________________________________________________
> > > _______________
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> > > Archives:    https://www.wireshark.org/lists/wireshark-dev
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> > > ibe
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