libmicrohttpd2

commit da5dce00a254ceb62be39be544782cd8ba508d4b
parent 422192c53c00370db1fe5f996d1cf6fdadc161a7
Author: Evgeny Grin (Karlson2k) <k2k@drgrin.dev>
Date:   Wed, 23 Apr 2025 14:52:48 +0200

configure: updated checks for warning flags for clang

Diffstat:
M
configure.ac
 | 
40
++++++++++++++++++++++++++++++----------

1 file changed, 30 insertions(+), 10 deletions(-)
diff --git a/configure.ac b/configure.ac
@@ -376,7 +376,6 @@ AS_CASE([${enable_build_type}],[debug|debugger],
     MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-ggdb3], [-g3], [-ggdb], [-g])
     MHD_CHECK_ADD_CC_CFLAG([-Wextra], [CFLAGS_ac])
     MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wpedantic], [-pedantic])
-    MHD_CHECK_ADD_CC_CFLAG([-Wdouble-promotion], [CFLAGS_ac])
     save_find_CFLAGS_ac="$CFLAGS_ac"
     MHD_FIND_ADD_CC_CFLAG_IFELSE(
       [
@@ -441,7 +440,9 @@ int main(void)
       [CFLAGS_ac], [-Wformat=2], [-Wformat]
     )
     AS_UNSET([save_find_CFLAGS_ac])
+    MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wimplicit-fallthrough=3], [-Wimplicit-fallthrough])
     MHD_CHECK_ADD_CC_CFLAGS([-Wformat-overflow -Wformat-truncation -Wformat-security -Wformat-signedness], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAG([-Wdouble-promotion], [CFLAGS_ac])
     MHD_CHECK_ADD_CC_CFLAGS([-Wmissing-include-dirs -Wshift-overflow=2 -Wstringop-overflow=4 -Walloc-zero], [CFLAGS_ac])
     MHD_CHECK_ADD_CC_CFLAGS([-Wduplicated-branches -Wduplicated-cond -Wfloat-equal -Wpointer-arith], [CFLAGS_ac])
     MHD_FIND_ADD_CC_CFLAG([CFLAGS_ac], [-Wshadow-all], [-Wshadow])
@@ -459,18 +460,32 @@ int main(void)
     MHD_CHECK_ADD_CC_CFLAGS([-Wbit-int-extension -Wbitfield-enum-conversion -Wparentheses -Wbool-operation], [CFLAGS_ac])
     MHD_CHECK_ADD_CC_CFLAGS([-Wcast-function-type -Wcomma -Wcomment -Wcompound-token-split], [CFLAGS_ac])
     MHD_CHECK_ADD_CC_CFLAGS([-Wconditional-uninitialized -Wdeprecated], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wdocumentation-pedantic -Wempty-init-stmt -Wenum-conversion -Wexpansion-to-defined], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wflexible-array-extensions -Wloop-analysis -Wformat-pedantic], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wformat-type-confusion -Wfour-char-constants], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wgcc-compat -Wgnu-anonymous-struct -Wgnu-compound-literal-initializer], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-conditional-omitted-operand -Wgnu-designator -Wgnu-empty-initializer], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-empty-struct -Wgnu-flexible-array-initializer -Wgnu-folding-constant], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-null-pointer-arithmetic -Wgnu-pointer-arith -Wgnu-redeclared-enum], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-union-cast -Wgnu-variable-sized-type-not-at-end -Widiomatic-parentheses], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wdocumentation -Wdocumentation-pedantic], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wempty-init-stmt -Wenum-conversion -Wexpansion-to-defined], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wflexible-array-extensions -Wloop-analysis -Wfour-char-constants -Wgcc-compat], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wformat-pedantic -Wformat-non-iso -Wformat-type-confusion], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAG([-Wgnu], [CFLAGS_ac],
+      [],
+      [
+        MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-anonymous-struct -Wgnu-compound-literal-initializer], [CFLAGS_ac])
+        MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-conditional-omitted-operand -Wgnu-designator -Wgnu-empty-initializer], [CFLAGS_ac])
+        MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-empty-struct -Wgnu-flexible-array-initializer -Wgnu-folding-constant], [CFLAGS_ac])
+        MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-null-pointer-arithmetic -Wgnu-pointer-arith -Wgnu-redeclared-enum], [CFLAGS_ac])
+        MHD_CHECK_ADD_CC_CFLAGS([-Wgnu-union-cast -Wgnu-variable-sized-type-not-at-end], [CFLAGS_ac])
+      ]
+    )
     MHD_CHECK_ADD_CC_CFLAGS([-Wmissing-noreturn -Wmissing-variable-declarations -Wnested-anon-types], [CFLAGS_ac])
-    MHD_CHECK_ADD_CC_CFLAGS([-Wnewline-eof -Wover-aligned -Wredundant-parens], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wnewline-eof -Wover-aligned -Wredundant-parens -Widiomatic-parentheses], [CFLAGS_ac])
     MHD_CHECK_ADD_CC_CFLAGS([-Wshift-sign-overflow -Wtautological-compare -Wunaligned-access], [CFLAGS_ac])
     MHD_CHECK_ADD_CC_CFLAGS([-Wunused -Wzero-as-null-pointer-constant -Wzero-length-array], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Waarch64-sme-attributes -Watomic-implicit-seq-cst -Warray-parameter], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wc++-compat -Wc23-compat -Wcalled-once-parameter -Wdecls-in-multiple-modules], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wduplicate-decl-specifier -Wduplicate-enum -Wembedded-directive], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wfunction-effects -Wignored-qualifiers -Wnonportable-system-include-path], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wincompatible-function-pointer-types-strict -Wmain -Wmain-return-type], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wnullable-to-nonnull-conversion -Woverlength-strings -Wpragmas], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wreserved-identifier -Wshift-bool -Wstatic-in-inline -Wswitch-default], [CFLAGS_ac])
+    MHD_CHECK_ADD_CC_CFLAGS([-Wthread-safety -Wunused-function], [CFLAGS_ac])
     MHD_CHECK_CC_CFLAG([-Wused-but-marked-unused],[CFLAGS_ac],
       [
         AC_CACHE_CHECK([whether $[]CC -Wused-but-marked-unused works with system headers],
@@ -503,6 +518,11 @@ int main(void)
         )
       ]
     )
+    # Check whether "enable" flag is supported as "disable" flag could be silently
+    # accepted when the compiled code itself does not produce any warnings
+    MHD_CHECK_CC_CFLAG([-Wunreachable-code-break],[CFLAGS_ac],
+      [MHD_CHECK_ADD_CC_CFLAG([-Wno-unreachable-code-break], [CFLAGS_ac])]
+    )
     #
     # Removed flags:
     #