[m4] Add compatibility for GCC15 and use version ranges for all recipes in CCI

recipes/autoconf/all/conanfile.py

@@ -35,7 +35,7 @@ def layout(self):
         basic_layout(self, src_folder="src")
 
     def requirements(self):
-        self.requires("m4/1.4.19") # Needed at runtime by downstream clients as well
+        self.requires("m4/[>=1.4 <2]") # Needed at runtime by downstream clients as well
 
     def package_id(self):
         del self.info.settings.arch
@@ -44,7 +44,7 @@ def package_id(self):
         self.info.requires.clear()
 
     def build_requirements(self):
-        self.tool_requires("m4/1.4.19")
+        self.tool_requires("m4/<host_version>")
         if self._settings_build.os == "Windows":
             self.win_bash = True
             if not self.conf.get("tools.microsoft.bash:path", check_type=str):

recipes/bison/all/conanfile.py

@@ -4,6 +4,7 @@
 from conan.tools.gnu import Autotools, AutotoolsToolchain
 from conan.tools.layout import basic_layout
 from conan.tools.microsoft import is_msvc, unix_path
+from conan.tools.scm import Version
 import os
 
 required_conan_version = ">=2.4"
@@ -34,7 +35,7 @@ def layout(self):
         basic_layout(self, src_folder="src")
 
     def requirements(self):
-        self.requires("m4/1.4.19")
+        self.requires("m4/[>=1.4 <2]")
 
     def validate(self):
         if is_msvc(self) and self.version == "3.8.2":
@@ -77,6 +78,9 @@ def generate(self):
                 "gl_cv_func_snprintf_directive_n=no",
             ])
             tc.extra_cflags.append("-FS")
+        elif self.settings.compiler == "apple-clang" and Version(self.version) < "3.7.6":
+            # INFO: lib/obstack.c:351:31: error: incompatible function pointer types initializing 'void (*)(void) __attribute__((noreturn))'
+            tc.extra_cflags.append("-Wno-error=incompatible-pointer-types")
         env = tc.environment()
         if is_msvc(self):
             automake_conf = self.dependencies.build["automake"].conf_info

recipes/elfutils/all/conanfile.py

@@ -84,7 +84,7 @@ def requirements(self):
     def build_requirements(self):
         self.tool_requires("gettext/0.22.5")
         self.tool_requires("automake/1.16.5")
-        self.build_requires("m4/1.4.19")
+        self.build_requires("m4/[>=1.4 <2]")
         self.build_requires("flex/2.6.4")
         self.tool_requires("bison/3.8.2")
         if not self.conf.get("tools.gnu:pkg_config", default=False, check_type=str):

recipes/flex/all/conanfile.py

@@ -41,10 +41,10 @@ def layout(self):
     def requirements(self):
         # Flex requires M4 to be compiled. If consumer does not have M4
         # installed, Conan will need to know that Flex requires it.
-        self.requires("m4/1.4.19")
+        self.requires("m4/[>=1.4 <2]")
 
     def build_requirements(self):
-        self.tool_requires("m4/1.4.19")
+        self.tool_requires("m4/<host_version>")
         self.tool_requires("gnu-config/cci.20210814")
         if hasattr(self, "settings_build") and cross_building(self):
             self.tool_requires(f"{self.name}/{self.version}")

recipes/gmp/all/conanfile.py

@@ -73,7 +73,7 @@ def validate(self):
             )
 
     def build_requirements(self):
-        self.tool_requires("m4/1.4.19")
+        self.tool_requires("m4/[>=1.4 <2]")
         if self.settings_build.os == "Windows":
             self.win_bash = True
             if not self.conf.get("tools.microsoft.bash:path", check_type=str):

recipes/libsystemd/all/conanfile.py

@@ -84,7 +84,7 @@ def validate(self):
 
     def build_requirements(self):
         self.tool_requires("meson/[>=1.4.0 <2]")
-        self.tool_requires("m4/1.4.19")
+        self.tool_requires("m4/[>=1.4 <2]")
         self.tool_requires("gperf/3.1")
         if not self.conf.get("tools.gnu:pkg_config", check_type=str):
             self.tool_requires("pkgconf/[>=2.1.0 <3]")

recipes/libtool/all/conanfile.py

@@ -47,7 +47,7 @@ def requirements(self):
 
     def build_requirements(self):
         self.tool_requires("automake/1.16.5")
-        self.tool_requires("m4/1.4.19")               # Needed by configure
+        self.tool_requires("m4/[>=1.4 <2]")               # Needed by configure
         self.tool_requires("gnu-config/cci.20210814")
         if self.settings_build.os == "Windows":
             self.win_bash = True

recipes/m4/all/conanfile.py

@@ -68,9 +68,16 @@ def generate(self):
                 "-rtlib=compiler-rt",
                 "-Wno-unused-command-line-argument",
             ])
+        elif self.settings.compiler == "apple-clang" and Version(self.version) < "1.4.19":
+            # INFO: lib/obstack.c:351:31: error: incompatible function pointer types initializing 'void (*)(void) __attribute__((noreturn))'
+            tc.extra_cflags.append("-Wno-error=incompatible-function-pointer-types")
+        elif self.version == "1.4.19" and self.settings.compiler == "gcc" and Version(self.settings.compiler) >= "15":
+            # FIXME: https://savannah.gnu.org/support/?func=detailitem&item_id=111150
+            # WORKAROUND: https://lists.buildroot.org/pipermail/buildroot/2025-May/777741.html
+            tc.extra_cflags.append("-std=gnu17")
         if cross_building(self) and is_msvc(self):
             triplet_arch_windows = {"x86_64": "x86_64", "x86": "i686", "armv8": "aarch64"}
-            
+
             host_arch = triplet_arch_windows.get(str(self.settings.arch))
             build_arch = triplet_arch_windows.get(str(self._settings_build.arch))
 

recipes/mingw-w64/linux/conanfile.py

@@ -64,7 +64,7 @@ def validate(self):
             )
 
     def build_requirements(self):
-        self.tool_requires("m4/1.4.19")
+        self.tool_requires("m4/[>=1.4 <2]")
         self.tool_requires("gmp/6.3.0")
         self.tool_requires("mpfr/4.2.0")
         self.tool_requires("mpc/1.3.1")

recipes/mpir/all/conanfile.py

@@ -70,7 +70,7 @@ def build_requirements(self):
         self.tool_requires("libtool/2.4.7")
         self.tool_requires("yasm/1.3.0")
         if not is_msvc(self):
-            self.tool_requires("m4/1.4.19")
+            self.tool_requires("m4/[>=1.4 <2]")
             if self._settings_build.os == "Windows":
                 self.win_bash = True
                 if not self.conf.get("tools.microsoft.bash:path", check_type=str):

recipes/pulseaudio/meson/conanfile.py

@@ -76,10 +76,10 @@ def validate(self):
                 )
 
     def build_requirements(self):
-        self.tool_requires("m4/1.4.19")
-        self.tool_requires("meson/1.3.2")
+        self.tool_requires("m4/[>=1.4 <2]")
+        self.tool_requires("meson/[>=1.3.2 <2]")
         if not self.conf.get("tools.gnu:pkg_config", check_type=str):
-            self.tool_requires("pkgconf/2.1.0")
+            self.tool_requires("pkgconf/[>=2.2 <3]")
 
     def source(self):
         get(self, **self.conan_data["sources"][self.version], strip_root=True)

recipes/tree-gen/all/conanfile.py

@@ -46,7 +46,7 @@ def layout(self):
     def build_requirements(self):
         if self._should_build_test:
             self.test_requires("gtest/1.15.0")
-        self.tool_requires("m4/1.4.19")
+        self.tool_requires("m4/[>=1.4 <2]")
         if self.settings.os == "Windows":
             self.tool_requires("winflexbison/2.5.24")
         else: