20260317-165339: MSVC C++ was never tried

Author: rexim

shared.h

@@ -12,14 +12,14 @@
 
 #if defined(__cplusplus)
     #if defined(_MSC_VER)
-        #define nob_cc_flags(cmd) cmd_append(cmd, "/W4", "/nologo", "/D_CRT_SECURE_NO_WARNINGS", "-I.")
+        #define nob_cc_flags(cmd) cmd_append(cmd, "/TP", "/W4", "/nologo", "/D_CRT_SECURE_NO_WARNINGS", "-I.")
     #else
         #define nob_cc(cmd) cmd_append(cmd, "cc", "-x", "c++")
         #define nob_cc_flags(cmd) cmd_append(cmd, "-Wall", "-Wextra", "-Wno-missing-field-initializers", "-Wswitch-enum", "-ggdb", "-I.");
     #endif
 #else // __cplusplus
     #if defined(_MSC_VER)
-        #define nob_cc_flags(cmd) cmd_append(cmd, "/W4", "/nologo", "/D_CRT_SECURE_NO_WARNINGS", "-I.")
+        #define nob_cc_flags(cmd) cmd_append(cmd, "/TC", "/W4", "/nologo", "/D_CRT_SECURE_NO_WARNINGS", "-I.")
     #elif defined(__APPLE__) || defined(__MACH__)
         // TODO: "-std=c99", "-D_POSIX_C_SOURCE=200112L" didn't work for MacOS, don't know why, don't really care that much at the moment.
         //   Anybody who does feel free to investigate.

tasks/20260317-165339/TASK.md

@@ -0,0 +1,14 @@
+# MSVC C++ was never tried
+
+- STATUS: OPEN
+- PRIORITY: 100
+- TAGS: bug,msvc
+
+Every time we were doing `cl.exe nob.c` MSVC was compiling everything in "C mode". 
+You can force it to compile in "C++ mode" if you provide flag `/TP` (See 
+[Specify Source File Type][source-file-type]). If you do `cl.exe /TP nob.c` 
+everything falls apart.
+
+We should fix everything and have a separate "C++ on MSVC" build on GitHub Actions.
+
+[source-file-type]: https://learn.microsoft.com/en-us/cpp/build/reference/tc-tp-tc-tp-specify-source-file-type?view=msvc-170