diff options
Diffstat (limited to 'libbuild2/cc/compile-rule.cxx')
| -rw-r--r-- | libbuild2/cc/compile-rule.cxx | 523 |
1 files changed, 286 insertions, 237 deletions
diff --git a/libbuild2/cc/compile-rule.cxx b/libbuild2/cc/compile-rule.cxx index 8274a04..832ed9b 100644 --- a/libbuild2/cc/compile-rule.cxx +++ b/libbuild2/cc/compile-rule.cxx @@ -3124,6 +3124,18 @@ namespace build2 } } + if (ctype == compiler_type::clang && cvariant == "emscripten") + { + if (x_lang == lang::cxx) + { + if (!find_option_prefix ("DISABLE_EXCEPTION_CATCHING=", args)) + { + args.push_back ("-s"); + args.push_back ("DISABLE_EXCEPTION_CATCHING=0"); + } + } + } + append_options (args, cmode, cmode.size () - (modules && clang ? 1 : 0)); append_sys_inc_options (args); // Extra system header dirs (last). @@ -4355,6 +4367,18 @@ namespace build2 } } + if (ctype == compiler_type::clang && cvariant == "emscripten") + { + if (x_lang == lang::cxx) + { + if (!find_option_prefix ("DISABLE_EXCEPTION_CATCHING=", args)) + { + args.push_back ("-s"); + args.push_back ("DISABLE_EXCEPTION_CATCHING=0"); + } + } + } + append_options (args, cmode, cmode.size () - (modules && clang ? 1 : 0)); append_sys_inc_options (args); @@ -5921,299 +5945,324 @@ namespace build2 size_t out_i (0); // Index of the -o option. size_t lang_n (0); // Number of lang options. - if (cclass == compiler_class::msvc) + switch (cclass) { - // The /F*: option variants with separate names only became available - // in VS2013/12.0. Why do we bother? Because the command line suddenly - // becomes readable. - // - // Also, clang-cl does not yet support them, at least not in 8 or 9. - // - bool fc (cmaj >= 18 && cvariant != "clang"); + case compiler_class::msvc: + { + // The /F*: option variants with separate names only became + // available in VS2013/12.0. Why do we bother? Because the command + // line suddenly becomes readable. + // + // Also, clang-cl does not yet support them, at least not in 8 or 9. + // + bool fc (cmaj >= 18 && cvariant != "clang"); - args.push_back ("/nologo"); + args.push_back ("/nologo"); - append_options (args, cmode); + append_options (args, cmode); - if (md.pp != preprocessed::all) - append_sys_inc_options (args); // Extra system header dirs (last). + if (md.pp != preprocessed::all) + append_sys_inc_options (args); // Extra system header dirs (last). + + // While we want to keep the low-level build as "pure" as possible, + // the two misguided defaults, C++ exceptions and runtime, just have + // to be fixed. Otherwise the default build is pretty much unusable. + // But we also make sure that the user can easily disable our + // defaults: if we see any relevant options explicitly specified, we + // take our hands off. + // + // For C looks like no /EH* (exceptions supported but no C++ objects + // destroyed) is a reasonable default. + // + if (x_lang == lang::cxx && !find_option_prefix ("/EH", args)) + args.push_back ("/EHsc"); + + // The runtime is a bit more interesting. At first it may seem like + // a good idea to be a bit clever and use the static runtime if we + // are building obja{}. And for obje{} we could decide which runtime + // to use based on the library link order: if it is static-only, + // then we could assume the static runtime. But it is indeed too + // clever: when building liba{} we have no idea who is going to use + // it. It could be an exe{} that links both static and shared + // libraries (and is therefore built with the shared runtime). And + // to safely use the static runtime, everything must be built with + // /MT and there should be no DLLs in the picture. So we are going + // to play it safe and always default to the shared runtime. + // + // In a similar vein, it would seem reasonable to use the debug + // runtime if we are compiling with debug. But, again, there will be + // fireworks if we have some projects built with debug and some + // without and then we try to link them together (which is not an + // unreasonable thing to do). So by default we will always use the + // release runtime. + // + if (!find_option_prefixes ({"/MD", "/MT"}, args)) + args.push_back ("/MD"); - // While we want to keep the low-level build as "pure" as possible, - // the two misguided defaults, C++ exceptions and runtime, just have - // to be fixed. Otherwise the default build is pretty much unusable. - // But we also make sure that the user can easily disable our - // defaults: if we see any relevant options explicitly specified, we - // take our hands off. - // - // For C looks like no /EH* (exceptions supported but no C++ objects - // destroyed) is a reasonable default. - // - if (x_lang == lang::cxx && !find_option_prefix ("/EH", args)) - args.push_back ("/EHsc"); - - // The runtime is a bit more interesting. At first it may seem like a - // good idea to be a bit clever and use the static runtime if we are - // building obja{}. And for obje{} we could decide which runtime to - // use based on the library link order: if it is static-only, then we - // could assume the static runtime. But it is indeed too clever: when - // building liba{} we have no idea who is going to use it. It could be - // an exe{} that links both static and shared libraries (and is - // therefore built with the shared runtime). And to safely use the - // static runtime, everything must be built with /MT and there should - // be no DLLs in the picture. So we are going to play it safe and - // always default to the shared runtime. - // - // In a similar vein, it would seem reasonable to use the debug runtime - // if we are compiling with debug. But, again, there will be fireworks - // if we have some projects built with debug and some without and then - // we try to link them together (which is not an unreasonable thing to - // do). So by default we will always use the release runtime. - // - if (!find_option_prefixes ({"/MD", "/MT"}, args)) - args.push_back ("/MD"); + msvc_sanitize_cl (args); - msvc_sanitize_cl (args); + append_header_options (env, args, header_args, a, t, md, md.dd); + append_module_options (env, args, module_args, a, t, md, md.dd); - append_header_options (env, args, header_args, a, t, md, md.dd); - append_module_options (env, args, module_args, a, t, md, md.dd); + // The presence of /Zi or /ZI causes the compiler to write debug + // info to the .pdb file. By default it is a shared file called + // vcNN.pdb (where NN is the VC version) created (wait for it) in + // the current working directory (and not the directory of the .obj + // file). Also, because it is shared, there is a special Windows + // service that serializes access. We, of course, want none of that + // so we will create a .pdb per object file. + // + // Note that this also changes the name of the .idb file (used for + // minimal rebuild and incremental compilation): cl.exe take the /Fd + // value and replaces the .pdb extension with .idb. + // + // Note also that what we are doing here appears to be incompatible + // with PCH (/Y* options) and /Gm (minimal rebuild). + // + if (find_options ({"/Zi", "/ZI"}, args)) + { + if (fc) + args.push_back ("/Fd:"); + else + out1 = "/Fd"; + + out1 += relo.string (); + out1 += ".pdb"; + + args.push_back (out1.c_str ()); + } - // The presence of /Zi or /ZI causes the compiler to write debug info - // to the .pdb file. By default it is a shared file called vcNN.pdb - // (where NN is the VC version) created (wait for it) in the current - // working directory (and not the directory of the .obj file). Also, - // because it is shared, there is a special Windows service that - // serializes access. We, of course, want none of that so we will - // create a .pdb per object file. - // - // Note that this also changes the name of the .idb file (used for - // minimal rebuild and incremental compilation): cl.exe take the /Fd - // value and replaces the .pdb extension with .idb. - // - // Note also that what we are doing here appears to be incompatible - // with PCH (/Y* options) and /Gm (minimal rebuild). - // - if (find_options ({"/Zi", "/ZI"}, args)) - { if (fc) - args.push_back ("/Fd:"); + { + args.push_back ("/Fo:"); + args.push_back (relo.string ().c_str ()); + } else - out1 = "/Fd"; + { + out = "/Fo" + relo.string (); + args.push_back (out.c_str ()); + } - out1 += relo.string (); - out1 += ".pdb"; + // @@ MODHDR MSVC + // + if (ut == unit_type::module_iface) + { + relm = relative (tp); - args.push_back (out1.c_str ()); - } + args.push_back ("/module:interface"); + args.push_back ("/module:output"); + args.push_back (relm.string ().c_str ()); + } - if (fc) - { - args.push_back ("/Fo:"); - args.push_back (relo.string ().c_str ()); - } - else - { - out = "/Fo" + relo.string (); - args.push_back (out.c_str ()); - } + // Note: no way to indicate that the source if already preprocessed. - // @@ MODHDR MSVC - // - if (ut == unit_type::module_iface) - { - relm = relative (tp); + args.push_back ("/c"); // Compile only. + append_lang_options (args, md); // Compile as. + args.push_back (sp->string ().c_str ()); // Note: relied on being last. - args.push_back ("/module:interface"); - args.push_back ("/module:output"); - args.push_back (relm.string ().c_str ()); + break; } - - // Note: no way to indicate that the source if already preprocessed. - - args.push_back ("/c"); // Compile only. - append_lang_options (args, md); // Compile as. - args.push_back (sp->string ().c_str ()); // Note: relied on being last. - } - else - { - if (ot == otype::s) + case compiler_class::gcc: { - // On Darwin, Win32 -fPIC is the default. - // - if (tclass == "linux" || tclass == "bsd") - args.push_back ("-fPIC"); - } + if (ot == otype::s) + { + // On Darwin, Win32 -fPIC is the default. + // + if (tclass == "linux" || tclass == "bsd") + args.push_back ("-fPIC"); + } - if (tsys == "win32-msvc") - { - switch (ctype) + if (tsys == "win32-msvc") { - case compiler_type::clang: + switch (ctype) { - // Default to the /EHsc exceptions support for C++, similar to - // the the MSVC case above. - // - // Note that both vanilla clang++ and clang-cl drivers add - // -fexceptions and -fcxx-exceptions by default. However, - // clang-cl also adds -fexternc-nounwind, which implements the - // 'c' part in /EHsc. Note that adding this option is not a mere - // optimization, as we have discovered through some painful - // experience; see Clang bug #45021. - // - // Let's also omit this option if -f[no]-exceptions is specified - // explicitly. - // - if (x_lang == lang::cxx) + case compiler_type::clang: { - if (!find_options ({"-fexceptions", "-fno-exceptions"}, args)) + // Default to the /EHsc exceptions support for C++, similar to + // the the MSVC case above. + // + // Note that both vanilla clang++ and clang-cl drivers add + // -fexceptions and -fcxx-exceptions by default. However, + // clang-cl also adds -fexternc-nounwind, which implements the + // 'c' part in /EHsc. Note that adding this option is not a + // mere optimization, as we have discovered through some + // painful experience; see Clang bug #45021. + // + // Let's also omit this option if -f[no]-exceptions is + // specified explicitly. + // + if (x_lang == lang::cxx) { - args.push_back ("-Xclang"); - args.push_back ("-fexternc-nounwind"); + if (!find_options ({"-fexceptions", "-fno-exceptions"}, args)) + { + args.push_back ("-Xclang"); + args.push_back ("-fexternc-nounwind"); + } } - } - // Default to the multi-threaded DLL runtime (/MD), similar to - // the MSVC case above. - // - // Clang's MSVC.cpp will not link the default runtime if either - // -nostdlib or -nostartfiles is specified. Let's do the same. - // - initializer_list<const char*> os {"-nostdlib", "-nostartfiles"}; - if (!find_options (os, cmode) && !find_options (os, args)) - { - args.push_back ("-D_MT"); - args.push_back ("-D_DLL"); - - // All these -Xclang --dependent-lib=... add quite a bit of - // noise to the command line. The alternative is to use the - // /DEFAULTLIB option during linking. The drawback of that - // approach is that now we can theoretically build the object - // file for one runtime but try to link it with something - // else. - // - // For example, an installed static library was built for a - // non-debug runtime while a project that links it uses - // debug. With the --dependent-lib approach we will try to - // link multiple runtimes while with /DEFAULTLIB we may end up - // with unresolved symbols (but things might also work out - // fine, unless the runtimes have incompatible ABIs). + // Default to the multi-threaded DLL runtime (/MD), similar to + // the MSVC case above. // - // Let's start with /DEFAULTLIB and see how it goes (see the - // link rule). + // Clang's MSVC.cpp will not link the default runtime if + // either -nostdlib or -nostartfiles is specified. Let's do + // the same. // + initializer_list<const char*> os {"-nostdlib", "-nostartfiles"}; + if (!find_options (os, cmode) && !find_options (os, args)) + { + args.push_back ("-D_MT"); + args.push_back ("-D_DLL"); + + // All these -Xclang --dependent-lib=... add quite a bit of + // noise to the command line. The alternative is to use the + // /DEFAULTLIB option during linking. The drawback of that + // approach is that now we can theoretically build the + // object file for one runtime but try to link it with + // something else. + // + // For example, an installed static library was built for a + // non-debug runtime while a project that links it uses + // debug. With the --dependent-lib approach we will try to + // link multiple runtimes while with /DEFAULTLIB we may end + // up with unresolved symbols (but things might also work + // out fine, unless the runtimes have incompatible ABIs). + // + // Let's start with /DEFAULTLIB and see how it goes (see the + // link rule). + // #if 0 - args.push_back ("-Xclang"); - args.push_back ("--dependent-lib=msvcrt"); + args.push_back ("-Xclang"); + args.push_back ("--dependent-lib=msvcrt"); - // This provides POSIX compatibility (map open() to _open(), - // etc). - // - args.push_back ("-Xclang"); - args.push_back ("--dependent-lib=oldnames"); + // This provides POSIX compatibility (map open() to _open(), + // etc). + // + args.push_back ("-Xclang"); + args.push_back ("--dependent-lib=oldnames"); #endif + } + + break; } + case compiler_type::gcc: + case compiler_type::msvc: + case compiler_type::icc: + assert (false); + } + } - break; + // For now Emscripten defaults to partial C++ exceptions support + // (you can throw but not catch). We enable full support unless it + // was explicitly disabled by the user. + // + if (ctype == compiler_type::clang && cvariant == "emscripten") + { + if (x_lang == lang::cxx) + { + if (!find_option_prefix ("DISABLE_EXCEPTION_CATCHING=", args)) + { + args.push_back ("-s"); + args.push_back ("DISABLE_EXCEPTION_CATCHING=0"); + } } - case compiler_type::gcc: - case compiler_type::msvc: - case compiler_type::icc: - assert (false); } - } - append_options (args, cmode); + append_options (args, cmode); - if (md.pp != preprocessed::all) - append_sys_inc_options (args); // Extra system header dirs (last). + if (md.pp != preprocessed::all) + append_sys_inc_options (args); // Extra system header dirs (last). - append_header_options (env, args, header_args, a, t, md, md.dd); - append_module_options (env, args, module_args, a, t, md, md.dd); + append_header_options (env, args, header_args, a, t, md, md.dd); + append_module_options (env, args, module_args, a, t, md, md.dd); - // Note: the order of the following options is relied upon below. - // - out_i = args.size (); // Index of the -o option. + // Note: the order of the following options is relied upon below. + // + out_i = args.size (); // Index of the -o option. - if (ut == unit_type::module_iface || ut == unit_type::module_header) - { - switch (ctype) + if (ut == unit_type::module_iface || ut == unit_type::module_header) { - case compiler_type::gcc: + switch (ctype) { - // Output module file is specified in the mapping file, the - // same as input. - // - if (ut != unit_type::module_header) // No object file. + case compiler_type::gcc: { - args.push_back ("-o"); - args.push_back (relo.string ().c_str ()); - args.push_back ("-c"); + // Output module file is specified in the mapping file, the + // same as input. + // + if (ut != unit_type::module_header) // No object file. + { + args.push_back ("-o"); + args.push_back (relo.string ().c_str ()); + args.push_back ("-c"); + } + break; } - break; - } - case compiler_type::clang: - { - relm = relative (tp); + case compiler_type::clang: + { + relm = relative (tp); - args.push_back ("-o"); - args.push_back (relm.string ().c_str ()); - args.push_back ("--precompile"); + args.push_back ("-o"); + args.push_back (relm.string ().c_str ()); + args.push_back ("--precompile"); - // Without this option Clang's .pcm will reference source files. - // In our case this file may be transient (.ii). Plus, it won't - // play nice with distributed compilation. - // - args.push_back ("-Xclang"); - args.push_back ("-fmodules-embed-all-files"); + // Without this option Clang's .pcm will reference source + // files. In our case this file may be transient (.ii). Plus, + // it won't play nice with distributed compilation. + // + args.push_back ("-Xclang"); + args.push_back ("-fmodules-embed-all-files"); - break; + break; + } + case compiler_type::msvc: + case compiler_type::icc: + assert (false); } - case compiler_type::msvc: - case compiler_type::icc: - assert (false); } - } - else - { - args.push_back ("-o"); - args.push_back (relo.string ().c_str ()); - args.push_back ("-c"); - } + else + { + args.push_back ("-o"); + args.push_back (relo.string ().c_str ()); + args.push_back ("-c"); + } - lang_n = append_lang_options (args, md); + lang_n = append_lang_options (args, md); - if (md.pp == preprocessed::all) - { - // Note that the mode we select must still handle comments and line - // continuations. So some more compiler-specific voodoo. - // - switch (ctype) + if (md.pp == preprocessed::all) { - case compiler_type::gcc: + // Note that the mode we select must still handle comments and + // line continuations. So some more compiler-specific voodoo. + // + switch (ctype) { - // -fdirectives-only is available since GCC 4.3.0. - // - if (cmaj > 4 || (cmaj == 4 && cmin >= 3)) + case compiler_type::gcc: { - args.push_back ("-fpreprocessed"); - args.push_back ("-fdirectives-only"); + // -fdirectives-only is available since GCC 4.3.0. + // + if (cmaj > 4 || (cmaj == 4 && cmin >= 3)) + { + args.push_back ("-fpreprocessed"); + args.push_back ("-fdirectives-only"); + } + break; } - break; - } - case compiler_type::clang: - { - // Clang handles comments and line continuations in the - // preprocessed source (it does not have -fpreprocessed). - // - break; + case compiler_type::clang: + { + // Clang handles comments and line continuations in the + // preprocessed source (it does not have -fpreprocessed). + // + break; + } + case compiler_type::icc: + break; // Compile as normal source for now. + case compiler_type::msvc: + assert (false); } - case compiler_type::icc: - break; // Compile as normal source for now. - case compiler_type::msvc: - assert (false); } - } - args.push_back (sp->string ().c_str ()); + args.push_back (sp->string ().c_str ()); + + break; + } } args.push_back (nullptr); |